{"id":12705,"date":"2026-05-12T10:01:32","date_gmt":"2026-05-12T10:01:32","guid":{"rendered":"https:\/\/www.weloop.org\/?p=12705"},"modified":"2026-05-12T12:03:34","modified_gmt":"2026-05-12T12:03:34","slug":"allocation-in-lca-is-not-a-problem-to-be-solved-it-is-a-perspective-to-be-chosen","status":"publish","type":"post","link":"https:\/\/www.weloop.org\/en\/lallocation-en-acv-nest-pas-un-probleme-a-resoudre-cest-une-perspective-a-choisir\/","title":{"rendered":"Allocation in LCA isn't a problem to solve, it's a perspective to choose"},"content":{"rendered":"<style>.kb-row-layout-id12705_347bd1-c0 > .kt-row-column-wrap{align-content:center;}:where(.kb-row-layout-id12705_347bd1-c0 > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:center;}.kb-row-layout-id12705_347bd1-c0 > .kt-row-column-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:var(--global-kb-gap-md, 2rem);max-width:1100px;margin-left:auto;margin-right:auto;padding-top:var(--global-kb-spacing-lg, 3rem);padding-bottom:var(--global-kb-spacing-md, 2rem);grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id12705_347bd1-c0 > .kt-row-layout-overlay{opacity:1;background-color:var(--nv-dark-bg);}@media all and (max-width: 1024px){.kb-row-layout-id12705_347bd1-c0 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}@media all and (max-width: 767px){.kb-row-layout-id12705_347bd1-c0 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id12705_347bd1-c0 alignfull kt-row-has-bg wp-block-kadence-rowlayout\"><div class=\"kt-row-layout-overlay kt-row-overlay-normal\"><\/div><div class=\"kt-row-column-wrap kt-has-1-columns kt-row-layout-equal kt-tab-layout-inherit kt-mobile-layout-row kt-row-valign-middle\">\n<style>.kadence-column12705_4142c5-52 > .kt-inside-inner-col,.kadence-column12705_4142c5-52 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column12705_4142c5-52 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column12705_4142c5-52 > .kt-inside-inner-col{flex-direction:column;}.kadence-column12705_4142c5-52 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column12705_4142c5-52 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column12705_4142c5-52{position:relative;}@media all and (max-width: 1024px){.kadence-column12705_4142c5-52 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column12705_4142c5-52 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column12705_4142c5-52\"><div class=\"kt-inside-inner-col\">\n<h1 class=\"wp-block-heading has-text-align-center has-nv-text-dark-bg-color has-text-color has-link-color wp-elements-5ecfbe8cdac7bededd01dd639ad4bb86\" id=\"h-l-allocation-en-acv-n-est-pas-un-probleme-a-resoudre-c-est-une-perspective-a-choisir\" style=\"border-style:none;border-width:0px;padding-top:var(--wp--preset--spacing--40);padding-right:var(--wp--preset--spacing--50);padding-bottom:var(--wp--preset--spacing--40);padding-left:var(--wp--preset--spacing--50)\"><strong>L&rsquo;allocation en ACV n&rsquo;est pas un probl\u00e8me \u00e0 r\u00e9soudre, c&rsquo;est une perspective \u00e0 choisir<\/strong><\/h1>\n\n\n\n<p class=\"has-text-align-center has-nv-site-bg-color has-text-color has-link-color wp-elements-a624b4327a2da85bacbb75b79ff907d3\"><em><strong>Dieuwertje Schrijvers<\/strong><\/em><\/p>\n<\/div><\/div>\n\n<\/div><\/div>\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>Pourquoi deux ACV correctes d&rsquo;un m\u00eame mat\u00e9riau recycl\u00e9 donnent-elles des r\u00e9ponses diff\u00e9rentes ? La raison en est l&rsquo;allocation : la fa\u00e7on dont les impacts environnementaux d&rsquo;un processus multifonctionnel, comme le recyclage, sont r\u00e9partis entre les produits. Il n&rsquo;existe pas de m\u00e9thode d&rsquo;allocation unique et correcte : le partitionnement, l&rsquo;expansion du syst\u00e8me, la substitution, la m\u00e9thode du cut-off, ou les r\u00e8gles normatives (par exemple EN 15804) apportent chacune une r\u00e9ponse valide \u00e0 une question sp\u00e9cifique, et le choix entre elles d\u00e9pend, entre autres, de si votre ACV est attributionnelle ou cons\u00e9quentielle. Dans une \u00e9conomie circulaire, o\u00f9 les mat\u00e9riaux se succ\u00e8dent \u00e0 travers de multiples cycles de vie, choisir la bonne perspective d&rsquo;allocation est ce qui rend un r\u00e9sultat d&rsquo;ACV fiable et comparable.<\/p>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-une-meme-chaine-de-valeur-deux-acv-deux-reponses-differentes\"><strong>Une m\u00eame cha\u00eene de valeur, deux ACV, deux r\u00e9ponses diff\u00e9rentes<\/strong><\/h2>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-neve-link-hover-color-color has-alpha-channel-opacity has-neve-link-hover-color-background-color has-background is-style-wide\"\/>\n\n\n\n<p>Le secteur de la construction s&rsquo;efforce de devenir plus circulaire en augmentant la teneur en mat\u00e9riaux recycl\u00e9s de ses produits et en permettant la valorisation des produits en fin de vie. Les industries en aval utilisent de plus en plus ces mat\u00e9riaux r\u00e9cup\u00e9r\u00e9s pour r\u00e9duire l&#8217;empreinte environnementale de leurs propres produits.  Prenons un exemple concret o\u00f9 un fabricant de mat\u00e9riau isolant incorpore des journaux recycl\u00e9s dans son produit et, en fin de vie, le mat\u00e9riau isolant est transform\u00e9 en biochar par pyrolyse, pour \u00eatre utilis\u00e9 comme engrais dans le secteur agricole. Pour d\u00e9montrer les b\u00e9n\u00e9fices de ces efforts, le fabricant d&rsquo;isolant comme l&rsquo;utilisateur agricole du biochar pourraient chacun commander une analyse du cycle de vie.&nbsp;<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"681\" src=\"https:\/\/www.weloop.org\/wp-content\/uploads\/2026\/05\/Image1-1024x681.jpg\" alt=\"\" class=\"wp-image-12804\" style=\"aspect-ratio:1.5037151791605703;width:759px;height:auto\" srcset=\"https:\/\/www.weloop.org\/wp-content\/uploads\/2026\/05\/Image1-1024x681.jpg 1024w, https:\/\/www.weloop.org\/wp-content\/uploads\/2026\/05\/Image1-300x200.jpg 300w, https:\/\/www.weloop.org\/wp-content\/uploads\/2026\/05\/Image1-768x511.jpg 768w, https:\/\/www.weloop.org\/wp-content\/uploads\/2026\/05\/Image1-18x12.jpg 18w, https:\/\/www.weloop.org\/wp-content\/uploads\/2026\/05\/Image1.jpg 1527w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\"><em>G\u00e9n\u00e9r\u00e9e avec l&rsquo;IA<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"430\" src=\"https:\/\/www.weloop.org\/wp-content\/uploads\/2026\/05\/Didi-figures-1-1024x430.png\" alt=\"\" class=\"wp-image-12812\" srcset=\"https:\/\/www.weloop.org\/wp-content\/uploads\/2026\/05\/Didi-figures-1-1024x430.png 1024w, https:\/\/www.weloop.org\/wp-content\/uploads\/2026\/05\/Didi-figures-1-300x126.png 300w, https:\/\/www.weloop.org\/wp-content\/uploads\/2026\/05\/Didi-figures-1-768x323.png 768w, https:\/\/www.weloop.org\/wp-content\/uploads\/2026\/05\/Didi-figures-1-1536x646.png 1536w, https:\/\/www.weloop.org\/wp-content\/uploads\/2026\/05\/Didi-figures-1-18x8.png 18w, https:\/\/www.weloop.org\/wp-content\/uploads\/2026\/05\/Didi-figures-1.png 1920w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\"><em>Pyrolyse pour la production de biochar, destin\u00e9 \u00e0 la fabrication d&rsquo;engrais pour plantes<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<p>La premi\u00e8re ACV, command\u00e9e par le fabricant d&rsquo;isolant en cellulose, peut afficher une faible empreinte carbone par m\u00e8tre carr\u00e9, car elle cr\u00e9dite l&rsquo;\u00e9vitement de la production d&rsquo;engrais vierge en fin de vie par la production de biochar. La seconde, command\u00e9e par un utilisateur agricole de ce m\u00eame biochar, affiche \u00e9galement une faible empreinte, car elle traite le mat\u00e9riau isolant en fin de vie comme un d\u00e9chet arrivant sans charge environnementale. Les deux \u00e9tudes sont v\u00e9rifi\u00e9es de mani\u00e8re ind\u00e9pendante. Peuvent-elles toutes les deux \u00eatre vraies ?&nbsp;<\/p>\n\n\n\n<p>Pour expliquer pourquoi deux \u00e9tudes correctes peuvent se contredire, je voudrais emprunter une vieille histoire.&nbsp;<\/p>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-l-elephant-dans-la-piece\"><strong>L&rsquo;\u00e9l\u00e9phant dans la pi\u00e8ce<\/strong><\/h2>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-neve-link-hover-color-color has-alpha-channel-opacity has-neve-link-hover-color-background-color has-background is-style-wide\"\/>\n\n\n\n<p>Six aveugles furent amen\u00e9s devant un \u00e9l\u00e9phant et invit\u00e9s \u00e0 le d\u00e9crire. Le premier tendit la main et sentit une grande paroi  large, coriace, chaude. \u00ab Un \u00e9l\u00e9phant, c&rsquo;est un mur \u00bb, dit-il. Le second toucha une d\u00e9fense lisse et courb\u00e9e : \u00ab Non, c&rsquo;est une lance. \u00bb Le troisi\u00e8me trouva la trompe : \u00ab C&rsquo;est un serpent \u00e9pais qui respire. \u00bb Le quatri\u00e8me pressa sa paume contre une patte : \u00ab Un pilier d&rsquo;arbre. \u00bb Le cinqui\u00e8me passa sa main le long d&rsquo;une oreille : \u00ab Un grand \u00e9ventail. \u00bb Le sixi\u00e8me saisit la queue : \u00ab Un bout de corde. \u00bb&nbsp;<\/p>\n\n\n\n<p>Chacun disait la v\u00e9rit\u00e9 sur ce qu&rsquo;il pouvait sentir, mais aucun ne disait la v\u00e9rit\u00e9 sur l&rsquo;\u00e9l\u00e9phant. L&rsquo;\u00e9l\u00e9phant \u00e9tait tout cela \u00e0 la fois. C&rsquo;est ce \u00e0 quoi ressemble l&rsquo;allocation en ACV.&nbsp;<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"724\" src=\"https:\/\/www.weloop.org\/wp-content\/uploads\/2026\/05\/Visuel-article-allocation-1024x724.png\" alt=\"\" class=\"wp-image-12802\" style=\"aspect-ratio:1.414404447082951;width:711px;height:auto\" srcset=\"https:\/\/www.weloop.org\/wp-content\/uploads\/2026\/05\/Visuel-article-allocation-1024x724.png 1024w, https:\/\/www.weloop.org\/wp-content\/uploads\/2026\/05\/Visuel-article-allocation-300x212.png 300w, https:\/\/www.weloop.org\/wp-content\/uploads\/2026\/05\/Visuel-article-allocation-768x543.png 768w, https:\/\/www.weloop.org\/wp-content\/uploads\/2026\/05\/Visuel-article-allocation-1536x1086.png 1536w, https:\/\/www.weloop.org\/wp-content\/uploads\/2026\/05\/Visuel-article-allocation-18x12.png 18w, https:\/\/www.weloop.org\/wp-content\/uploads\/2026\/05\/Visuel-article-allocation.png 2000w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\"><em>G\u00e9n\u00e9r\u00e9e avec l&rsquo;IA<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-chaque-methode-est-concue-pour-une-question\"><strong>Chaque m\u00e9thode est con\u00e7ue pour une question<\/strong><\/h2>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-neve-link-hover-color-color has-alpha-channel-opacity has-neve-link-hover-color-background-color has-background is-style-wide\"\/>\n\n\n\n<p>Lorsque je me trouve face \u00e0 une situation qui n\u00e9cessite une allocation, je passe beaucoup de temps sur une question en apparence simple : De quoi parle r\u00e9ellement votre \u00e9tude ? Chaque choix m\u00e9thodologique qui s&rsquo;ensuit d\u00e9pend de cette question, et la plupart des d\u00e9saccords sur l&rsquo;allocation que j&rsquo;ai rencontr\u00e9s s&rsquo;av\u00e8rent \u00eatre des d\u00e9saccords non formul\u00e9s sur le p\u00e9rim\u00e8tre.&nbsp;<\/p>\n\n\n\n<p>Si l&rsquo;on examine la cha\u00eene de valeur de la cellulose, au moins cinq questions de recherche l\u00e9gitimes y coexistent.&nbsp;<\/p>\n\n\n\n<p>Le fabricant d&rsquo;isolant souhaite conna\u00eetre l&#8217;empreinte d&rsquo;un m\u00e8tre carr\u00e9 de son produit. Il doit quantifier ces impacts conform\u00e9ment aux r\u00e8gles normatives de l&rsquo;EN 15804, qui prescrivent des r\u00e8gles comptables pour attribuer les impacts aux produits du secteur de la construction.&nbsp;<\/p>\n\n\n\n<p>L&rsquo;utilisateur du biochar peut mener l&rsquo;ACV dans le cadre d&rsquo;un projet de recherche. Le chercheur veut savoir si un processus agricole utilisant du biochar est moins responsable des impacts que lorsque d&rsquo;autres sources d&rsquo;engrais v\u00e9g\u00e9taux sont utilis\u00e9es, et les r\u00e9sultats sont publi\u00e9s dans un article scientifique. Le chercheur vise la conformit\u00e9 \u00e0 l&rsquo;ISO 14044, et l&rsquo;article doit passer l&rsquo;examen par les pairs.&nbsp;<\/p>\n\n\n\n<p>Les deux \u00e9tudes sont orient\u00e9es produit, mais les r\u00e9sultats seront publi\u00e9s \u00e0 destination d&rsquo;audiences diff\u00e9rentes, qui ont une compr\u00e9hension diff\u00e9rente de \u00ab pour quels impacts un produit doit-il \u00eatre tenu responsable \u00bb.&nbsp;<\/p>\n\n\n\n<p>On peut \u00e9galement consid\u00e9rer d&rsquo;autres parties prenantes qui pourraient souhaiter r\u00e9aliser une ACV pour la m\u00eame cha\u00eene de valeur. Le recycleur qui exploite le processus de pyrolyse pose un type de question diff\u00e9rent : quelle est la performance environnementale du processus de pyrolyse qui re\u00e7oit une tonne de cellulose post-usage et produit du biochar ? Ce processus est-il environnementalement plus favorable que les autres voies de valorisation des d\u00e9chets ? Il s&rsquo;agit d&rsquo;une approche orient\u00e9e processus. L&rsquo;ensemble du processus multifonctionnel est l&rsquo;unit\u00e9 d&rsquo;analyse ; il n&rsquo;y a rien \u00e0 allouer, car aucun produit n&rsquo;est isol\u00e9.&nbsp;<\/p>\n\n\n\n<p>Un analyste politique peut s&rsquo;interroger sur l&rsquo;influence d&rsquo;une disponibilit\u00e9 r\u00e9duite de journaux recyclables sur leur utilisation en cascade dans l&rsquo;industrie de l&rsquo;isolant en cellulose, suivie de l&rsquo;utilisation du biochar valoris\u00e9 dans le secteur agricole. Ici, l&rsquo;ensemble de la cha\u00eene en cascade est d&rsquo;int\u00e9r\u00eat ; l&rsquo;allocation est \u00e0 nouveau inutile.&nbsp;<\/p>\n\n\n\n<p>Nous pouvons non seulement modifier le p\u00e9rim\u00e8tre de notre syst\u00e8me en passant d&rsquo;une orientation produit \u00e0 une orientation processus, ou m\u00eame consid\u00e9rer de multiples cycles de vie dans un syst\u00e8me en cascade, mais aussi appliquer un p\u00e9rim\u00e8tre d&rsquo;impact diff\u00e9rent. Le responsable d\u00e9veloppement durable du fabricant d&rsquo;isolant peut vouloir savoir si le d\u00e9tournement du mat\u00e9riau isolant en fin de vie vers des processus de production de biochar r\u00e9duit r\u00e9ellement les \u00e9missions mondiales, ou si d&rsquo;autres solutions de fin de vie doivent \u00eatre privil\u00e9gi\u00e9es. Ici, le p\u00e9rim\u00e8tre d&rsquo;impact de l&rsquo;ACV ne se concentre pas sur la \u00ab responsabilit\u00e9 d&rsquo;un seul acteur ou processus pour les impacts \u00bb mais englobe les impacts globaux, et le praticien ACV conduira une ACV cons\u00e9quentielle plut\u00f4t qu&rsquo;attributionnelle.&nbsp;<\/p>\n\n\n\n<p>Plus de cinq questions, un seul \u00e9l\u00e9phant. Chaque question requiert une approche d&rsquo;allocation diff\u00e9rente. Le partitionnement, l&rsquo;expansion du syst\u00e8me (ou de l&rsquo;unit\u00e9 fonctionnelle), la substitution, ou, dans certains cas, on peut se contenter de l&rsquo;approche cut-off. Ce ne sont pas des m\u00e9thodes concurrentes pour r\u00e9pondre \u00e0 la m\u00eame question. Ce sont des outils construits autour de questions diff\u00e9rentes, et chacun apporte une r\u00e9ponse coh\u00e9rente qui est correcte pour sa question et incoh\u00e9rente si on la prend pour une r\u00e9ponse \u00e0 une question diff\u00e9rente. Les praticiens qui ne voient pas cela finissent par d\u00e9battre de quel chiffre est le bon, alors que le vrai d\u00e9saccord porte sur la question \u00e0 laquelle on r\u00e9pond.&nbsp;<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><a href=\"https:\/\/www.mdpi.com\/2071-1050\/12\/14\/5587\" target=\"_blank\" rel=\" noreferrer noopener\"><img loading=\"lazy\" decoding=\"async\" width=\"602\" height=\"573\" src=\"https:\/\/www.weloop.org\/wp-content\/uploads\/2026\/05\/Image2.png\" alt=\"\" class=\"wp-image-12801\" style=\"aspect-ratio:1.0506122003763192;width:545px;height:auto\" srcset=\"https:\/\/www.weloop.org\/wp-content\/uploads\/2026\/05\/Image2.png 602w, https:\/\/www.weloop.org\/wp-content\/uploads\/2026\/05\/Image2-300x286.png 300w, https:\/\/www.weloop.org\/wp-content\/uploads\/2026\/05\/Image2-13x12.png 13w\" sizes=\"auto, (max-width: 602px) 100vw, 602px\" \/><\/a><figcaption class=\"wp-element-caption\"><em>D\u00e9pendance de la proc\u00e9dure d&rsquo;attribution par rapport \u00e0 l&rsquo;objectif et \u00e0 la port\u00e9e de l&rsquo;ACV (adapt\u00e9 de Schrijvers et al. 2020)&nbsp;<\/em><\/figcaption><\/figure>\n<\/div>\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-meme-la-bonne-methode-d-allocation-a-une-portee-limitee\"><strong>M\u00eame la bonne m\u00e9thode d&rsquo;allocation a une port\u00e9e limit\u00e9e<\/strong><\/h2>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-neve-link-hover-color-color has-alpha-channel-opacity has-neve-link-hover-color-background-color has-background is-style-wide\"\/>\n\n\n\n<p>Il existe un second niveau d&rsquo;aveuglement, et il est au c\u0153ur d&rsquo;un article que nous avons r\u00e9cemment publi\u00e9 dans <a href=\"https:\/\/www.frontiersin.org\/journals\/sustainability\/articles\/10.3389\/frsus.2026.1766353\/full\" target=\"_blank\" rel=\"noreferrer noopener\">Frontiers in Sustainability<\/a> avec des coll\u00e8gues de LIST, Neovili, Contactica et IVL, dans le cadre du projet EU Horizon Europe CALIMERO.&nbsp;<\/p>\n\n\n\n<p>Nous avons pos\u00e9 une question diff\u00e9rente : \u00e0 travers la bio\u00e9conomie circulaire, quelles strat\u00e9gies de circularit\u00e9 chaque m\u00e9thode ACV peut-elle r\u00e9ellement percevoir ? Tout effort visant \u00e0 appliquer une strat\u00e9gie de circularit\u00e9 au sein d&rsquo;un syst\u00e8me de produits se traduira-t-il par un r\u00e9sultat modifi\u00e9 d&rsquo;une \u00e9tude ACV ? Nous avons rassembl\u00e9 48 strat\u00e9gies de circularit\u00e9, des taux de r\u00e9cup\u00e9ration des mat\u00e9riaux aux utilisations en cascade, de la pr\u00e9servation de la qualit\u00e9 \u00e0 l&rsquo;extension de la dur\u00e9e de vie et nous les avons confront\u00e9es \u00e0 six m\u00e9thodes ACV de r\u00e9f\u00e9rence (PEF, EN 15804, Allocation au Point de Substitution (APOS), ACV cons\u00e9quentielle, et deux variantes d&rsquo;expansion du syst\u00e8me) ainsi qu&rsquo;\u00e0 trois indicateurs de circularit\u00e9 autonomes (MCI, CTI et ISO 59020:2024). De plus, nous avons illustr\u00e9 l&rsquo;application des exigences de mod\u00e9lisation des m\u00e9thodes&nbsp;ACV&nbsp;pour divers sc\u00e9narios de fin de vie pour l&rsquo;isolation \u00e0 fibres naturelles.<\/p>\n\n\n\n<div class=\"flourish-embed flourish-network\" data-src=\"visualisation\/20148285\">\n  <script src=\"https:\/\/public.flourish.studio\/resources\/embed.js\"><\/script>\n  <noscript>\n    <img decoding=\"async\" src=\"https:\/\/public.flourish.studio\/visualisation\/20148285\/thumbnail\" width=\"100%\" alt=\"network visualization\" \/>\n  <\/noscript>\n<\/div>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>La comparaison a montr\u00e9 qu&rsquo;aucune m\u00e9thode unique ni aucun indicateur de circularit\u00e9 autonome ne couvrait l&rsquo;ensemble des strat\u00e9gies de circularit\u00e9. La mise en cascade des mat\u00e9riaux \u00e0 travers des utilisations successives, l&rsquo;upcycling par opposition au downcycling, l&rsquo;am\u00e9lioration des taux d&rsquo;efficacit\u00e9 du recyclage : ces \u00e9l\u00e9ments sont visibles pour certaines mains sur l&rsquo;\u00e9l\u00e9phant, et pas pour d&rsquo;autres. Cela signifie que l&rsquo;aveuglement d&rsquo;un praticien ACV est structurel. Il ne peut pas \u00eatre corrig\u00e9 avec de meilleures donn\u00e9es.<\/p>\n\n\n\n<p>En d&rsquo;autres termes, m\u00eame lorsqu&rsquo;un praticien a correctement choisi la m\u00e9thode correspondant \u00e0 sa question de recherche, la perspective de cette m\u00e9thode ne couvre qu&rsquo;une partie de l&rsquo;\u00e9l\u00e9phant. Les parties manquantes de l&rsquo;\u00e9l\u00e9phant ne sont pas des d\u00e9fauts de m\u00e9thode ; elles sont simplement hors p\u00e9rim\u00e8tre.<\/p>\n\n\n\n<div style=\"height:40px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-l-es-nbsp-aveugles-nbsp-ont-nbsp-compare-nbsp-leurs-nbsp-notes\">L<strong><strong>es&nbsp;aveugles&nbsp;ont&nbsp;compar\u00e9&nbsp;leurs&nbsp;notes<\/strong><\/strong><\/h2>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-neve-link-hover-color-color has-alpha-channel-opacity has-neve-link-hover-color-background-color has-background is-style-wide\"\/>\n\n\n\n<p>La version de la parabole des aveugles et de l&rsquo;\u00e9l\u00e9phant que j&rsquo;ai rencontr\u00e9e dans l&rsquo;un des livres de mes enfants se termine par un d\u00e9saccord. Mais il semblerait qu&rsquo;il existe une autre version dans laquelle les aveugles finissent par s&rsquo;asseoir ensemble et comparer ce que chacun a ressenti. De six v\u00e9rit\u00e9s partielles, ils assemblent quelque chose qui n&rsquo;est plus partiel. M\u00eame si aucun d&rsquo;eux n&rsquo;a vu l&rsquo;\u00e9l\u00e9phant dans son int\u00e9gralit\u00e9, ensemble, ils en donnent une description compl\u00e8te.<\/p>\n\n\n\n<p>C&rsquo;est ce que nous avons propos\u00e9 dans l&rsquo;article de Frontiers. Des tandems de m\u00e9thodes, choisis d\u00e9lib\u00e9r\u00e9ment et appliqu\u00e9s en parall\u00e8le, peuvent donner une image (plus) compl\u00e8te de la cha\u00eene de valorisation. L&rsquo;ACV attributionnelle orient\u00e9e produit du fabricant d&rsquo;isolant, l&rsquo;expansion du syst\u00e8me orient\u00e9e processus du recycleur et la vision cons\u00e9quentielle du responsable d\u00e9veloppement durable, pr\u00e9sent\u00e9es c\u00f4te \u00e0 c\u00f4te, racontent une histoire plus riche que n&rsquo;importe laquelle d&rsquo;entre elles prise isol\u00e9ment  et elles cessent d&rsquo;\u00eatre une comp\u00e9tition pour d\u00e9terminer quel chiffre est \u00ab le bon \u00bb.<\/p>\n\n\n\n<p>L&rsquo;allocation n&rsquo;est pas un probl\u00e8me \u00e0 r\u00e9soudre ; c&rsquo;est une perspective \u00e0 choisir. Plus nous combinons de perspectives, plus nous voyons de l&rsquo;\u00e9l\u00e9phan<\/p>\n\n\n\n<div style=\"height:40px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-vous-nbsp-souhaitez-nbsp-en-nbsp-savoir-nbsp-plus\"><strong>Vous&nbsp;souhaitez&nbsp;en&nbsp;savoir&nbsp;plus ?<\/strong><\/h2>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-neve-link-hover-color-color has-alpha-channel-opacity has-neve-link-hover-color-background-color has-background is-style-wide\"\/>\n\n\n\n<p class=\"has-neve-link-hover-color-color has-text-color has-link-color wp-elements-428528f89758c9f07280d026f13d55e6\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-nv-dark-bg-color\">L&rsquo;article de Frontiers est en <a href=\"https:\/\/www.frontiersin.org\/journals\/sustainability\/articles\/10.3389\/frsus.2026.1766353\/full\" target=\"_blank\" rel=\"noreferrer noopener\">acc\u00e8s libre<\/a> et pr\u00e9sente une cartographie syst\u00e9matique de 48 strat\u00e9gies de circularit\u00e9 \u00e0 travers six m\u00e9thodes ACV et trois indicateurs de circularit\u00e9 autonomes. Il vous donne une indication sur \u00ab quelle m\u00e9thode devrais-je utiliser, et qu&rsquo;est-ce qu&rsquo;elle manquera ? \u00bb<\/mark><\/p>\n\n\n\n<p>La prochaine fois que quelqu&rsquo;un vous soumet un chiffre ACV pour un mat\u00e9riau recycl\u00e9, r\u00e9cup\u00e9r\u00e9 ou autrement valoris\u00e9, demandez-lui quelle partie de l&rsquo;\u00e9l\u00e9phant il tenait lorsqu&rsquo;il l&rsquo;a mesur\u00e9.<\/p>\n\n\n\n<p id=\"h-nos-services-associes\"><\/p>\n\n\n<div\r\n    class=\"align  wp-block-icb-cards\"    id=\"icbCards-1\"\r\n    data-attributes='{&quot;clientId&quot;:&quot;e93a3c25-53d7-4c16-8bcc-a7aa2ff887f3&quot;,&quot;cards&quot;:[{&quot;background&quot;:{&quot;color&quot;:&quot;#fff&quot;},&quot;img&quot;:&quot;https:\\\/\\\/www.weloop.org\\\/wp-content\\\/uploads\\\/2025\\\/12\\\/iStock-1387035426.jpg&quot;,&quot;title&quot;:&quot;&lt;strong&gt;&lt;strong&gt;D\\u00e9couvrez notre formation avanc\\u00e9e sur l\\u2019allocation en ACV&lt;\\\/strong&gt;&lt;\\\/strong&gt;&quot;,&quot;desc&quot;:&quot;23 juin au 25 juin 2026&quot;,&quot;btnLabal&quot;:&quot;EN SAVOIR PLUS&quot;,&quot;btnUrl&quot;:&quot;https:\\\/\\\/www.weloop.org\\\/formation-allocation-2026\\\/&quot;,&quot;isBtn&quot;:true,&quot;cardUrl&quot;:&quot;&quot;}],&quot;columns&quot;:{&quot;desktop&quot;:1,&quot;tablet&quot;:2,&quot;mobile&quot;:1},&quot;titleColor&quot;:&quot;var(--nv-dark-bg)&quot;,&quot;btnColors&quot;:{&quot;color&quot;:&quot;#fff&quot;,&quot;bg&quot;:&quot;var(--nv-secondary-accent)&quot;},&quot;className&quot;:&quot;&quot;,&quot;align&quot;:&quot;&quot;,&quot;layout&quot;:&quot;vertical&quot;,&quot;theme&quot;:&quot;default&quot;,&quot;columnGap&quot;:&quot;20px&quot;,&quot;rowGap&quot;:&quot;20px&quot;,&quot;isImg&quot;:true,&quot;isTab&quot;:false,&quot;imgHeight&quot;:&quot;200px&quot;,&quot;imgPos&quot;:&quot;first&quot;,&quot;background&quot;:{&quot;color&quot;:&quot;#0000&quot;},&quot;padding&quot;:{&quot;top&quot;:&quot;0px&quot;,&quot;right&quot;:&quot;0x&quot;,&quot;bottom&quot;:&quot;0px&quot;,&quot;left&quot;:&quot;0px&quot;},&quot;cardPadding&quot;:{&quot;top&quot;:&quot;0px&quot;,&quot;right&quot;:&quot;0px&quot;,&quot;bottom&quot;:&quot;0px&quot;,&quot;left&quot;:&quot;0px&quot;},&quot;cardRadius&quot;:&quot;8px&quot;,&quot;cardShadow&quot;:[{&quot;hOffset&quot;:&quot;0px&quot;,&quot;vOffset&quot;:&quot;4px&quot;,&quot;blur&quot;:&quot;8px&quot;,&quot;spreed&quot;:&quot;0px&quot;,&quot;color&quot;:&quot;#0003&quot;}],&quot;contentAlign&quot;:&quot;left&quot;,&quot;contentPadding&quot;:{&quot;top&quot;:&quot;20px&quot;,&quot;right&quot;:&quot;15px&quot;,&quot;bottom&quot;:&quot;15px&quot;,&quot;left&quot;:&quot;15px&quot;},&quot;titleTypo&quot;:{&quot;fontSize&quot;:&quot;20&quot;},&quot;descTypo&quot;:{&quot;fontSize&quot;:&quot;16&quot;},&quot;descColor&quot;:&quot;#000&quot;,&quot;btnTypo&quot;:{&quot;fontSize&quot;:15,&quot;textDecoration&quot;:&quot;none&quot;},&quot;btnAlign&quot;:&quot;left&quot;,&quot;btnHovColors&quot;:{&quot;color&quot;:&quot;#fff&quot;,&quot;bg&quot;:&quot;#fe6601&quot;},&quot;btnPadding&quot;:{&quot;top&quot;:&quot;10px&quot;,&quot;right&quot;:&quot;15px&quot;,&quot;bottom&quot;:&quot;10px&quot;,&quot;left&quot;:&quot;15px&quot;},&quot;btnRadius&quot;:&quot;8px&quot;,&quot;productsInfo&quot;:[{&quot;title&quot;:&quot;Alienware Gaming Laptop&quot;,&quot;description&quot;:&quot;Alienware Laptop is one of the best Gaming Laptops. Every gamer loves it.&quot;,&quot;variant&quot;:[&quot;i3&quot;,&quot;i5&quot;,&quot;i6&quot;,&quot;i9&quot;],&quot;image&quot;:&quot;https:\\\/\\\/templates.bplugins.com\\\/wp-content\\\/uploads\\\/2025\\\/05\\\/Alienware-Laptop.png&quot;,&quot;button&quot;:{&quot;text&quot;:&quot;Buy Now&quot;,&quot;link&quot;:&quot;&quot;}},{&quot;title&quot;:&quot;Alienware Gaming Laptop&quot;,&quot;description&quot;:&quot;Alienware Laptop is one of the best Gaming Laptops. Every gamer loves it.&quot;,&quot;variant&quot;:[&quot;i3&quot;,&quot;i5&quot;,&quot;i6&quot;,&quot;i9&quot;],&quot;image&quot;:&quot;https:\\\/\\\/templates.bplugins.com\\\/wp-content\\\/uploads\\\/2025\\\/05\\\/Alienware-Laptop.png&quot;,&quot;button&quot;:{&quot;text&quot;:&quot;Buy Now&quot;,&quot;link&quot;:&quot;&quot;}},{&quot;title&quot;:&quot;Alienware Gaming Laptop&quot;,&quot;description&quot;:&quot;Alienware Laptop is one of the best Gaming Laptops. Every gamer loves it.&quot;,&quot;variant&quot;:[&quot;i3&quot;,&quot;i5&quot;,&quot;i6&quot;,&quot;i9&quot;],&quot;image&quot;:&quot;https:\\\/\\\/templates.bplugins.com\\\/wp-content\\\/uploads\\\/2025\\\/05\\\/Alienware-Laptop.png&quot;,&quot;button&quot;:{&quot;text&quot;:&quot;Buy Now&quot;,&quot;link&quot;:&quot;&quot;}}],&quot;styles&quot;:{&quot;margin&quot;:&quot;20px&quot;},&quot;grabCardInfo&quot;:{&quot;image&quot;:&quot;https:\\\/\\\/templates.bplugins.com\\\/wp-content\\\/uploads\\\/2025\\\/06\\\/quest.webp&quot;,&quot;title&quot;:&quot;Grab A Device&quot;,&quot;description&quot;:&quot;Your journey into spatial starts now. Get Meta Horizon OS for yourself or power up your entire team.&quot;,&quot;button&quot;:{&quot;text&quot;:&quot;Purchase a Meta Quest&quot;,&quot;link&quot;:&quot;#&quot;}},&quot;alignment&quot;:&quot;center&quot;,&quot;options&quot;:{&quot;isOpenInNewTab&quot;:true,&quot;isVariantShow&quot;:true,&quot;isButtonShow&quot;:true,&quot;isVisibleCircle&quot;:true,&quot;isTagShow&quot;:true,&quot;isNewTabOpen&quot;:true,&quot;isHoverRotated&quot;:true},&quot;hasCustomCSS&quot;:false,&quot;customCSS&quot;:&quot;&quot;,&quot;TrpContentRestriction&quot;:{&quot;restriction_type&quot;:&quot;exclude&quot;,&quot;selected_languages&quot;:[],&quot;panel_open&quot;:true},&quot;otterConditions&quot;:[]}'>\r\n<\/div>\n\n\n<p id=\"h-nos-services-associes\"><\/p>\n\n\n\n<div style=\"height:200px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n","protected":false},"excerpt":{"rendered":"<p>L&rsquo;allocation en ACV n&rsquo;est pas un probl\u00e8me \u00e0 r\u00e9soudre, c&rsquo;est une perspective \u00e0 choisir Dieuwertje Schrijvers Pourquoi deux ACV correctes d&rsquo;un m\u00eame mat\u00e9riau recycl\u00e9 donnent-elles des r\u00e9ponses diff\u00e9rentes ? La raison en est l&rsquo;allocation : la fa\u00e7on dont les impacts environnementaux d&rsquo;un processus multifonctionnel, comme le recyclage, sont r\u00e9partis entre les produits. Il n&rsquo;existe pas&hellip;&nbsp;<\/p>\n<div class=\"read-more-wrapper\"><a href=\"https:\/\/www.weloop.org\/en\/lallocation-en-acv-nest-pas-un-probleme-a-resoudre-cest-une-perspective-a-choisir\/\" class=\"button button-primary\" rel=\"bookmark\">Read More &raquo;<span class=\"screen-reader-text\">Allocation in LCA isn't a problem to solve, it's a perspective to choose<\/span><\/a><\/div>","protected":false},"author":3,"featured_media":12802,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","neve_meta_reading_time":"","_themeisle_gutenberg_block_has_review":false,"_ti_tpc_template_sync":false,"_ti_tpc_template_id":"","footnotes":""},"categories":[126],"tags":[],"class_list":["post-12705","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites-et-decryptages"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.5 (Yoast SEO v27.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Allocation en ACV : choisir sa perspective, pas la bonne m\u00e9thode<\/title>\n<meta name=\"description\" content=\"L&#039;allocation en ACV n&#039;a pas de bonne r\u00e9ponse universelle, elle a une bonne question. 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La raison en est l&rsquo;allocation : la fa\u00e7on dont les impacts environnementaux d&rsquo;un processus multifonctionnel, comme le recyclage, sont r\u00e9partis entre les produits. 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