In the assembly manufacturing industry, the customer deciding specification from midst of the product menu which shows first in catalog and the like adjusting to that and assembling the product from parts inventory it is the manufacturing system which ships.

Onekindof broad BTO. When you distinguish with BTO of narrow sense, BTO "after receiving order, vis-a-vis the fact that thing of timing of entry into production it starts making the standard product", is said, as for CTO "modifying product specification according to order contents, that it produces", ?????? doing the product is an important point. In addition those which correspond to the demand of the customer at the level such as modification of the part and the option which are used unlike ETO.

For the manufacturer to the utmost, with stock the basic conception that is in common with BTO, it completes, delivers the product to the customer directly, but the point that differs CTO expands the width of product selection of the customer, improves customer satisfaction.

"The ?? model " of major ??of PC productionsale is the most famous example "of BTO", but in the sense that it is CTO the user can select the type and memory capacity etc. of CPU.

It is compatible thing and the payment date that, those which are made with requirements specification change, the mechanism of control of high-level production being necessary,the service construction of BOM and the like becomes indispensable.