How architectures are pivots between business-oriented design and technology-oriented design

In approximately 250 words, explain how architectures are pivots between business-oriented design and technology-oriented design of e-Business scenarios. In approximately 250 words, explain why it is important to choose points in time wisely when analyzing past and future developments. In approximately 250 words, explain why business strategy provides the "umbrella" for a set of concrete business models. In approximately 250 words, explain why a good e-Business analyst or designer must always consciously balance between separation and integration of aspects.