GSA

[flechtenberg]

Issue: Implement Global Sensitivity Analysis (GSA) in PULPO

Description:
In deterministic solutions obtained through PULPO, it is valuable to identify the Life Cycle Inventory (LCI) parameters that most significantly influence the impact results. Understanding these key parameters can guide efforts to refine their uncertainties, thereby enhancing the robustness and reliability of the outcomes.

Proposed Actions:

1. Identify Existing Frameworks:

   • Research and compile a list of packages that have implemented GSA with Brightway.
   • Evaluate the compatibility and potential for integration of these frameworks with PULPO.

2. Implement a Solution:

   • Based on the evaluation, choose to either integrate an existing GSA framework into PULPO or develop a new module inspired by the functionalities of existing frameworks.

[flechtenberg]

These are the tools I identified so far:

Tool	Methods	Integration	Highlights
[Akula]	Sobol, screening, correlations	Presamples + Brightway2	High-dimensional, structured uncertainty
[gsa_framework]	Sobol, FAST, correlations	Brightway2 Monte Carlo	Robust & flexible
[lca_algebraic]	Sobol , Symbolic	Brightway2 + Sympy	Fast for parametric models
[lca-global-sensitivity-analysis]	Δ-method	Brightway2 + SALib	Captures full output distribution
[Activity Browser]	GUI-based Δ-method + Monte-Carlo	Full GUI	Easy to use

I'll further look into using Akula for now. The ability to account for structured uncertainty looks interesting.