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An architect starts the planning phase by collecting information, starting with business requirements. You might be tempted to start with technical details about the current solution. You might want to ask technical questions so that you can start eliminating options. You may even think that you've solved this kind of problem before and you just have to pick the right architecture pattern. Resist those inclinations if you have them. All architecture design decisions must be made in the context of business requirements.

Business requirements define the operational landscape in which you will develop a solution. Example business requirements are as follows:

 The need to reduce capital expenditures

 Accelerating the pace of software development

 Reporting on service-level objectives

 Reducing time to recover from an incident

 Improving compliance with industry regulations

Business requirements may be about costs, customer experience, or operational improvements. A common trait of business requirements is that they are rarely satisfied by a single technical decision.