Configured parts in the units they are stocked in

A rule’s quantity in millimetres becomes the part’s stocking unit: metres, or kilograms for a rod stocked by mass. TW310’s rod is now cut to the well’s length and costed in kg, and a part with no standard cost is priced at its last purchase price.

TW310: the rod follows the well

The thermowell’s bar or rod is no longer a fixed 1 kg costing nothing. Rule TW310-Q01 makes its length well insertion + well extension + 75 mm. The rod is stocked by mass, so the length is turned into kilograms through its kg per metre (π/4 × d² × density; Rod-SS316-36 is 8.1227 kg per metre) and costed at the rod’s price per kg.

Units on a configured bill

• A quantity measured in mm is in MM whatever count unit the rule names, and is converted to the part’s stocking unit: MM to M to KG for a rod stocked in kg. The stem length TG310 hands down to TG100 keeps its unit too.
• A formula written quantity = X means the quantity is X. (It used to be read as a comparison, and put the part on the bill at 0.)
• Computed values are worked out before the bill and the recipe, so their formulas can use them.

A part with no standard cost

It is costed at its last purchase order price, and the line says so: costed at its last purchase price (with the PO number), as the part has no standard cost. A part that has never been bought adds nothing to the cost, and the line says that too: give the item its standard cost.