Quick answer
Cover all steps from material acceptance to goods dispatch, marking ingredient and aid addition points, key control points, cleaning and changeover nodes, and the rework loop; boxes and arrows must match the real line. Rejection causes: generic templates, unmarked isolation on shared lines, a lost rework route, drawings not matching the site. The LHLN compares the diagram with the formula table and layout plan, so have the workshop manager verify before stamping.
Detailed explanation
Elements of a sound diagram
Start with raw-material acceptance and warehousing, then pre-treatment, dosing, processing, primary packaging, secondary packaging and finished-goods storage. Number each node, write material grades at dosing points, and mark key control points and halal-sensitive steps such as isolated start-up, cleaning verification and shared-line changeover separately; show the rework loop with a dashed line.
Four frequent rejection patterns
- A downloaded generic template whose steps do not match the equipment on site.
- Only the main line is shown; rework and nonconforming-product loops are omitted.
- Shared-line production does not show time-based isolation and cleaning nodes.
- The drawing has no version number or dated signatures of draftsman and reviewer.
Three-party check before release
- R&D verifies dosing points against the formula table, with no aid omitted.
- The workshop manager checks equipment order against actual material flow.
- The quality manager checks cleaning, changeover and rework nodes. A diagram-site mismatch becomes a nonconformity on the audit day; amending a wrong chart is often slower than redrawing.
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