▪ Every design decision must be justified by a business requirement.

▪ To avoid over-engineering the application architectures, keep to drive design for business requirement.

▪ Engineers are tend to be over-engineering with latest architecture styles, use latest tools.

▪ It becomes an experimental application that use all latest fancy tools and architectures.

▪ We should clearly define functional and nonfunctional requirements.

▪ Define our limits, constraints and assumptions of the application and define business objectives

clearly.

▪ Start and Grow Application with Metrics

▪ How many Concurrent Users that our application handle ?

▪ What is the target of expected Requests/second Latency ?

▪ What level of application outage is acceptable?

▪ Business requirements drive these design considerations.

https://www.brighthubpm.com/project-planning/115555-what-differences-exist-between-business-requirements-and-design-requirements/