If the Business Idea is not robust in all the scenarios, then some of the Distinctive Competencies will have to be adjusted or replaced. Inspired and informed by provocative scenarios, the strategic conversation can keep revisiting the Business Idea and keep revising the company's competencies where need be. An enormous amount of experience is manifest in Kees's book. The book is an excellent supplement to Peter Schwartz's The Art of the Long View because it burrows further into technique and it offers more guidance on how to translate good scenarios into good strategy.
Scenario planning is a practitioner's art.
Its origins are in the real world of management, it is therefore more a craft than a science. A set of corporate scenarios make people in the organisation share a wider set of models with which events can be interpreted. This means that a wider range of events will be seen.