Node A-0 · Context diagram
Systems engineering tools
that run on your machine
Build IDEF0 diagrams, redline requirements, and run trade studies in your browser. No account, no upload, no license server. The tools below are numbered like a decomposition — because they are one.
IDEF0 Diagram Builder
Draw activity boxes and ICOM arrows on the diagonal, per the IDEF0 standard. Export clean SVG or PNG for your documents.
NODE A2 · SHEET 03Requirements Statement Checker
Paste requirements, get redlines: EARS pattern classification, vague terms, escape clauses, compound statements, passive voice.
NODE A3 · SHEET 04Trade Study Matrix
Weighted decision matrix (Pugh-style) with sensitivity check and export for your trade study report.
NODE A4 · SHEET 055×5 Risk Matrix
Likelihood × consequence risk cube with standard color coding, risk register table, and briefing-ready export.
NODE A5 · SHEET 06Requirement ID Scheme Generator
Design a numbering convention — prefixes, hierarchy, allocation ranges — and generate the scheme document for your project.
NODE A6 · SHEET 07SE Acronym Decoder
Systems engineering and defense acquisition acronyms, decoded with context — not just the expansion.
Why these tools exist
Most IDEF0 and requirements tooling is either abandoned desktop software from the 90s or an enterprise suite priced per seat. If you just need to draw one clean context diagram or sanity-check a spec before review, neither is the right size. These tools are the right size.
Everything runs client-side. Your diagrams and requirements never leave your browser, which also means they're safe to use with material you'd rather not paste into someone else's server.