Differences

This shows you the differences between two versions of the page.

--- life_cycle_analysis [2026/05/19 17:47] – [LCA for Naknow] antoine
+++ life_cycle_analysis [2026/05/19 17:55] (current) – [Methodology for components] antoine
@@ Line 33: / Line 33: @@
 ===== LCA for Naknow =====
-====  Methodology for devices ====
+====  Methodology for components ====
+Naknow studies 5 components :
+  * [[intro_wafer|Wafers]]
+  * [[intro_pcb|PCB]]
+  * [[intro_screen|Screens]]
+  * [[intro_hdd|HDD disks]]
+  * [[intro_optical_sensor|Optical sensors]]
-**Declared unit**: 1 piece of equipment of the category under study, during the whole lifespan.
-**System boundaries**: Specific to each model, as detailed in the [model documentation](Link to doc).
-**Approach**: A digital equipment is considered a sum of components (mechanical, electronics, etc.), following a bottom-up approach. Hence, an equipement is broken down into components. The environmental impacts of each component are assessed and then summed to obtain the total impacts of the device.
+**Fonctional unit** : 1 component, during the whole lifespan.
+**System boundaries** : Specific to each model.
-Each category of equipment or component is defined by one parametric model. For each specific piece of equipment (Laptop X from manufacturer Y), the corresponding model is ‘fed’ with the technical specifications of the equipment to be assessed. Commercial references are also available to prefill the technical specifications of the equipment.
+**Approach**: //A digital equipment is considered a sum of components (mechanical, electronics, etc.), following a bottom-up approach. Hence, an equipement is broken down into components. The environmental impacts of each component are assessed and then summed to obtain the total impacts of the device.//
+Each category of component is defined by one parametric model. For each specific piece of equipment (Laptop X from manufacturer Y), the corresponding model is ‘fed’ with the technical specifications of the equipment to be assessed. Commercial references are also available to prefill the technical specifications of the equipment.
 The following approach is applied for the different life cycle stages:
@@ Line 49: / Line 57: @@
 === Manufacturing ===
+^ **How it works** ^ **Types of parameters** ^ **Types of sources** ^
+| - Breakdown of the equipment into components \\ - Parametric modelling of the environmental impacts of each component \\ - Sum of the impacts of each component | Mass or surface area of material, type of material \\ Technical configuration of equipment (CPU/GPU model, amount of RAM/storage, screen size, etc.) | Scientific literature \\ Benchmarks carried out on samples of marketed equipment \\ Databases \\ Own research |
-| **How it works**                                                                                                                                             | **Types of parameters**                                                                                                                                | **Types of sources**                                                                                                |
+=== Distribution ===
-| :----------------------------------------------------------------------------------------------------------------------------------------------------------- | :----------------------------------------------------------------------------------------------------------------------------------------------------- | :------------------------------------------------------------------------------------------------------------------ |
-| - Breakdown of the equipment into components - Parametric modelling of the environmental impacts of each component <br> Sum of the impacts of each component | Mass or surface area of material, type of material <br> Technical configuration of equipment (CPU/GPU model, amount of RAM/storage, screen size, etc.) | Scientific literature <br> Benchmarks carried out on samples of marketed equipment <br> Databases <br> Own research |
-=== Distribution: ===
-| **How it works**                                                                                              | **Types of parameters** | **Types of sources** |
-| :------------------------------------------------------------------------------------------------------------ | :---------------------- | :------------------- |
-| - Definition of a typical transport profile for each equipment category (using aeroplane, ship, train, truck) |
-| - Weight of equipment <br> - Distance covered <br> -Type of transport                                         |
-| - Scientific literature <br> - LCA and public reports <br> - Databases                                        |
-  - Use:
-| **How it works**                                                                                 | **Types of parameters** | **Types of sources** |
+^ **How it works** ^ **Types of parameters** ^ **Types of sources** ^
-| :----------------------------------------------------------------------------------------------- | :---------------------- | :------------------- |
+| - Definition of a typical transport profile for each equipment category (using aeroplane, ship, train, truck) | - Weight of equipment \\ - Distance covered \\ - Type of transport | - Scientific literature \\ - LCA and public reports \\ - Databases |
-| - Default average consumption value estimated from the technical specifications of the equipment |
-| - Load rate <br> - Duration of use <br> - Country of use <br>                                    |
-| - Scientific literature <br> - LCA and public reports <br> - Databases                           |
-  - End-of-life:
+=== Use ===
-| **How it works** | **Types of parameters** | **Types of sources** |
+^ **How it works** ^ **Types of parameters** ^ **Types of sources** ^
-| :--------------- | :---------------------- | :------------------- |
+| - Default average consumption value estimated from the technical specifications of the equipment | - Load rate \\ - Duration of use \\ - Country of use | - Scientific literature \\ - LCA and public reports \\ - Databases |
-| - Definition of end-of-life scenarios (recycling, incineration, landfill) for the various category of materials (DEEE, metals, plastics, etc.)
+=== End-of-life ===
-  - Sum of the impacts of each category <br> |
+^ **How it works** ^ **Types of parameters** ^ **Types of sources** ^
-  - Mass of material, type of material <br> - Repartition of waste between the various scenarios | - Scientific literature <br> - Public reports <br>- Databases <br>- Own research <br> |
+| - Definition of end-of-life scenarios (recycling, incineration, landfill) for the various category of materials (DEEE, metals, plastics, etc.) \\ - Sum of the impacts of each category | - Mass of material, type of material \\ - Repartition of waste between the various scenarios | - Scientific literature \\ - Public reports \\ - Databases \\ - Own research |
-By using a bottom-up approach agnostic of the device manufacturer, there could be a difference between impacts obtained from Resilio Database and the manufacturer's data.
-Our main hypothesis is that manufacturer are in fact, assemblers, and that the result of their actions on the final impact is very low. This comes from the very low relative impact of assembly, and the fact that most of the eletronics supply chain is based on the components of a couple of industrial players, all using the same industrial processes. More details are available in our whitepaper [Link to whitepaper].
 ==== Product Envionnemental Footprint (PEF) method ====