The “Requirements” category in systems engineering serves as a critical guide to defining, documenting, and maintaining system necessities. It begins with gathering inputs from stakeholders, which may include customer needs, legal obligations, or technical constraints.
Every system is ultimately built for someone — and that someone rarely knows, or can articulate, exactly what they need. Bridging that gap is the whole job. User requirements describe what the people who will actually use a system need it to do, in their own terms — the foundation every technical requirement is later…
A great product idea dies the moment two people picture it differently and both start building. A Product Design Specification (PDS) is the document that prevents that — a complete statement of everything a new product must be and do, from performance and cost to materials and regulations, agreed before design begins. It is the…
Picture the demo that goes wrong. The developer proudly shows the finished feature; the product owner frowns and says “but that is not what I meant by done.” Both are right, because nobody agreed what “done” meant before the work started. Acceptance criteria are the conditions a user story must satisfy to be accepted as…
Two questions decide whether a system is any good, and people mix them up constantly. Did we build the thing right? That is verification. Did we build the right thing? That is validation. Verification checks a system against its specification; validation checks it against the real-world need. A system can pass one and fail the…
