Figure 10.2 — The Bill of Materials form. Drawing to be produced after the UI/UX pass: a BOM annotated — the made product and type, and its lines: component, quantity or percent, unit, and scrap allowance.
The BOM's home is Products (§6.9); these are its fields, with their manufacturing meaning:
- Product — the made product this recipe produces. One active BOM per product: the one work orders execute.
- Type — Kit: each line states a fixed quantity per unit of the product. Formula: each line states a percent of the whole, the percents must add to 100, and they are applied to weight where the products declare weights — the shape of recipes in food, feed and chemicals.
- Code and Name — the recipe's own identity, so a product's recipe can be referred to in words.
- Notes — the recipe's free text.
- Active — an inactive BOM cannot be released against; deactivating a recipe retires it without deleting its history.
- Each line: the Component product; its Quantity (kit) or Percent (formula), in the line's own Unit of measure — converted to the component's stocking unit when the recipe is used; a Scrap %, the honest allowance for what the process loses, added on top of the net quantity; an optional Operation note naming the stage that uses the component; and line Notes.
A component may itself be manufactured, with its own BOM: explosions and cost build-ups walk through it level by level until only bought-in components remain (§10.9).