Schematex
idef0·FIPS PUB 183 (IDEF0)·business, manufacturing·complexity 3/3·since v0.8.0

IDEF0 A0 — fulfil customer order

An IDEF0 A0 function decomposition with all four ICOM arrow types. Inputs, controls, mechanisms and outputs each pin to a fixed box edge, so the model is correct by construction per FIPS PUB 183.

For the business / systems analyst

Open in Playground →
idef0·§ —
↘ preview
100%
Fulfil customer order IDEF0 function model "Fulfil customer order" (node A0): 3 functions on a diagonal staircase. ICOM arrows: 4 input, 3 control, 3 mechanism, 2 output. Boxes: 1. Validate order (A1); 2. Pick and pack (A2); 3. Ship and invoice (A3). Fulfil customer order Customer order I1 Credit policy C1 Order management system M1 Validated order Inventory I2 Picking rules C2 Warehouse staff M2 Packed shipment Carrier contract C3 Shipping carrier M3 Delivered order O1 Invoice O2 Validate order 1 Pick and pack 2 Ship and invoice 3 NODE A0 TITLE Fulfil customer order NUMBER
UTF-8 · LF · 17 lines · 480 chars✓ parsed·5.4 ms·7.6 KB SVG

What this shows

An IDEF0 A0 diagram — the top-level functional decomposition of an order-fulfilment system — showing all four ICOM arrow roles. Reading the box edges by convention: Inputs enter on the left (the customer order, inventory), Controls govern from the top (credit policy, picking rules, carrier contract), Mechanisms supply resources from the bottom (the order system, warehouse staff, carrier), and Outputs leave on the right (delivered order, invoice). The box-to-box flows (A1 -> A2 "Validated order") chain the three activities.

The differentiator is that the model is correct by construction, not just drawn. Because the arrow keyword is the box edge it attaches to, the engine enforces ICOM placement — you cannot accidentally draw a control as an input. It resolves every box reference, assigns decomposition numbers (A0 → A1..A3), codes the boundary arrows down each edge (I1/C1/O1/M1…), and applies the FIPS 3-to-6-box guideline. A flow that tried to enter a box via its .output edge would be rejected, because an output leaves a box — the standard is enforced, not suggested.

IDEF0 syntax →