Glossary · System architectureAlso called architectureChecked 27 September 2026
What does system architecture mean in a proposal?
System architecture is how a system is built: its parts, how they connect, and where a person decides instead of the system. On a proposal it should be a section you can read, not a promise you take on faith, and it is what tells you whether a change next year is a setting or a rebuild.
In one lineThe parts, the connections, and where a person decides.
Why it matters to you
The reason to ask for it is that architecture is what separates a system from a script somebody wrote once and never explained. A named section on a proposal, with its own diagram, is a sign the builder can say what happens when one part fails, not just that it usually works.
It also sets the cost of change. A future request sorts into four buckets: a setting, a contained code change, a larger one, or a rebuild. Architecture is what makes that sorting possible, because a system whose parts are named and separated can absorb a new rule where a script cannot.
What it is not
System architecture is not a diagram drawn after the fact to look thorough. It is read before the build starts, and it is checked against what the system actually does once it is running.
If a proposal used this word and did not explain it, ask us.
The first conversation is with the people who would build it. If there is a fit, the Consult comes next.