Some articles on ecritoire:

Meta-process Modeling - Example: “Multi-model View”
... approach is called “Multi-model view” and was applied on the CREWS-L’Ecritoire method ... The CREWS-L’Ecritoire method represents a methodical approach for Requirements Engineering, “the part of the IS development that involves investigating ... Besides the CREWS-L’Ecritoire approach, the multi-model view has served as a basis for representing (a) the three other requirements engineering approaches developed ...