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Steps 1 to 3 can be typically prepared by the systems architect alone (or with a small team), without opening too much the circle of stakeholders. Steps 4 and 5 shall however necessarily be achieved through a collective decision process – typically managed in a collective prioritization workshop – as soon as one wants the involved stakeholders to be part of the decision in order them to be collectively engaged in the decision (and respect it). Each of these steps is quickly described below. The first step – stakeholder identification – is not the easier...