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Life cycle assessment or LCA is a methodology for assessing environmental impacts associated with all the stages of the life cycle of a commercial product, process, or service.

==LCA phases==
* Production phase
* Construction phase
* Use phase
* Demolition and processing stage
* Possibility for reuse, recovery and recycling
The LCA executor calculates the energy used, the raw materials and released waste and emissions for each life phase. These results can be added to NMD (National Environmental Database) and are then available to everyone. Environmental efforts such as extra sustainable transport are also reflected in the MKI (Environmental Cost Indicator). The MKI also encourages tenderers to select the most sustainable supplier of products and services in order to arrive at the lowest possible MKI contract and to get contracts awarded. A circular economy is extremely important. Especially when it comes to scarce raw materials. However, circular material does not always mean that it is also sustainable. It has been found that some circular materials have a negative effect on the environment. This only emerges in an LCA. Buyers can rest assured that the MKI values are reliably provided the LCA has been verified by an independent verifier. MKI has the advantage that sustainable investments really come forward and this makes sustainable products more attractive to buyers. A prepared LCA can be used for 5 years, so the costs are only incurred once every 5 years.