--- title: Co-Product Allocation description: Assign shares of impact between your main product and secondary outputs using XYCLE’s built-in co-product allocation system. --- [Skip to content](https://xycle.minviro.com/support/co-product-allocation#main-content) English - United Kingdom Show submenu for translations ![Primary\_White\_XYCLE\_Logo.png-09 (2)](https://xycle.minviro.com/hs-fs/hubfs/Primary_White_XYCLE_Logo.png-09%20(2).png?width=200&height=58&name=Primary_White_XYCLE_Logo.png-09%20(2).png) Open main navigation Close main navigation - English - United Kingdom Show submenu for translations - [Request Support](mailto:support@minviro.com) [Request Support](mailto:support@minviro.com) Search Our Help Center - There are no suggestions because the search field is empty. 1. [XYCLE Help Center](https://xycle.minviro.com/support?hsLang=en-gb) 2. [XYCLE How-Tos](https://xycle.minviro.com/support/xycle-how-tos?hsLang=en-gb) # Co-Product Allocation ## Assign shares of impact between your main product and secondary outputs using XYCLE’s built-in co-product allocation system. ### 1. Select Your Process Block Open the LCA project where co-product allocation is required. Navigate to the unit process you want to allocate impacts for. Co-product allocation is typically used when one process yields multiple outputs, such as a main product and a valuable by-product or scrap. ### 2. Click on the ‘Allocate’ Button Locate the outbound flow you want to apply allocation to. Click on the **'Requires Allocation'** button in the final product row. This opens the co-product allocation interface. ![Screenshot 2025-08-07 at 15.39.05](https://xycle.minviro.com/hs-fs/hubfs/Screenshot%202025-08-07%20at%2015.39.05.png?width=620&height=374&name=Screenshot%202025-08-07%20at%2015.39.05.png) ### 3. Choose Allocation Type Select your desired allocation method from the dropdown. The options include: - **Mass Allocation** — Use when the environmental burden should be split based on the mass of each co-product. - **Economic** — Use when the burden should be split according to the economic value (price or revenue) of each product. This choice will affect how the impacts are divided across the two (or more) co-products. Ensure consistency of units, as there is no automatic unit conversion. In cases where a co-product **displaces another product on the market**, and **reliable data (emission factors)** on the product or service that the co-product is assumed to displace exists, we can use **System Expansion.** ### 4. Choose Co-Product Allocation or System Expansion Click the "Type" dropdown next to your co-product. - Select **Co-Product (allocate)** to divide environmental impacts. - Select **Co-Product (expand)** if your co-product displaces another product on the market. ![Screenshot 2025-08-07 at 15.58.25](https://xycle.minviro.com/hs-fs/hubfs/Screenshot%202025-08-07%20at%2015.58.25.png?width=547&height=266&name=Screenshot%202025-08-07%20at%2015.58.25.png) ### 5. Map an Emission Factor (for System Expansion) If you're using System Expansion, choose an appropriate characterisation factor from a background database. ![Screenshot 2025-08-07 at 16.02.22](https://xycle.minviro.com/hs-fs/hubfs/Screenshot%202025-08-07%20at%2016.02.22.png?width=575&height=200&name=Screenshot%202025-08-07%20at%2016.02.22.png) ### 6. Select the Dataset Row Click on the dataset row (e.g. “sodium sulfate production, from natural sources”) in the database panel to finalise the mapping. ![Screenshot 2025-08-07 at 16.02.49](https://xycle.minviro.com/hs-fs/hubfs/Screenshot%202025-08-07%20at%2016.02.49.png?width=494&height=275&name=Screenshot%202025-08-07%20at%2016.02.49.png) ### 7. Save and Close Once your values and allocation or credit type have been set, **close the modal** to apply the allocation. ---   Your allocation or credit is now reflected in the inventory table, visible under the appropriate row. ![Screenshot 2025-08-07 at 16.04.04](https://xycle.minviro.com/hs-fs/hubfs/Screenshot%202025-08-07%20at%2016.04.04.png?width=521&height=314&name=Screenshot%202025-08-07%20at%2016.04.04.png) XYCLE automatically recalculates impact scores. 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