Assessment Strategies
======================

The Assessment Strategies define how the :ref:`Environmental Data` should be recorded in an :ref:`Environmental Declaration`.


.. graphviz:: conceptual-model-assessment-strategy.dot
    :caption: Schematic overview of conceptual model zoomed at Assessment Strategies
    :name: conceptual-model-schematic-assessment-strategies

.. _assessment-strategy:

Assessment Strategy
####################

Currently, there are two strategies available (Strategy A1 and Strategy A2) for calculating the :ref:`Environmental Data` and
environmental costs. In the future, additional strategies with different parameters may be introduced. At present, there
are three entities associated with each strategy: the `Weighing Vector`_, the `Environmental Impact Module`_, and the
`Environmental Impact Indicator`_. However, these may change over time.


.. _environmental-impact-indicator:

Environmental Impact Indicator
##############################

Entity that defines each impact indicator for which environmental impacts have been determined. Some examples of these
categories include human-toxicological effects and depletion of abiotic resources. It's worth noting that
different :ref:`assessment strategies <assessment-strategy>` may use different impact categories. In other words, the specific
categories considered may vary depending on the particular assessment strategy being used.

.. _impact-module:

Environmental Impact Module
############################

An impact module is a module of the life cycle of the :ref:`Construction Products (or processes)<construction-product-or-process>`, such as A1 - A3, A4, A5, B1, etc.
In the EU norm, these modules are grouped into stages, such as "Product Stage", "Construction Process Stage", etc.
However, in the database, Impact Modules are not grouped.

Weighing Vector
###############

The Weighing Vector is a set of weights. For A1 the weights are determined
on a country specific level and indicate the (relative) severity and quantities of each `Environmental Impact Indicator`_.
The weights are expressed in euros per unit of the `Environmental Impact Indicator`_.
Each `Assessment Strategy`_ might contain its own Weighing Vector that should be applied to the  :ref:`Environmental Data`.