A material take-off (MTO) is the list of material a defined piece of work needs — each item by description, specification, unit and quantity — worked out from the approved drawings for that piece of work. It is prepared by the engineering or technical office, not by procurement: the engineer who knows the drawing decides what the zone consumes; procurement decides where to buy it and at what price. The MTO is what turns an approved design into a purchase request, and later into an issue from the store to the factory. A take-off prepared before the material submittal is approved risks buying the wrong specification. One that does not name a stock item risks buying something the store can never match to what it later issues.
For contractors who fabricate what they install, the take-off is the first link in the material trail, so Muthari OS makes it belong to a zone and refuses lines that would break the trail.
Take-off lines live on the zone, linked to its BOQ item. Each line must resolve to a stock item in the catalogue — a line the store cannot identify is refused — so the request, the receipt, the batch and the issue all share one identity from the start.
A take-off cannot be built until the material submittal for that item is approved. Where a verbal approval has been given, it can be recorded as a fact with the name of the person who gave it, and the record shows it was verbal.
Submitting the take-off creates the purchase request automatically, carrying the stock item links, and stamps the zones as requested. When the store later allocates stock and the cover is short, a gap purchase request is raised for the shortfall without anyone re-typing the lines.