Change
process modelThis guideline provides a structured approach towards the identification
and evaluation of alternative scenaria for change. The pre-requisites for
this approach is a change process model (see Follow goal deployment
strategy). The change process model is revisited so as to identify
and then evaluate alternative scenaria against pre-defined criteria.
Based on this evaluation, comparisons of alternative scenaria occur and
recommendations are made concerning the most appropriate scenaria.
| Prune the change process model | This step aims at pruning the change process model in order to limit the number of scenaria to be examined, evaluated and compared. |
| Perform branch evaluation | In order to limit the complexity of the evaluation process, each branch of the pruned change process model is considered separately. Each scenario in a branch is evaluated first qualitatively and then, quantitatively. Qualitative evaluation is based on criteria whereas quantitative evaluation uses metrics. A preferred set of scenaria is selected by branch. |
| Perform global evaluation | In this step, the appropriateness of the preferred scenaria defined as sets of branch scenaria resulting of the previous step are globally evaluated. This can result in backtracking on choices made locally. |
| Derive the preferred set of scenaria | The preferred set of scenaria is documented and recommendations for selection of the most suitable one are provided. |
Change
process model
Scenario
model
