Method and apparatus for creating shape data

A apparatus for creating shape data by using three-dimensional CAD, comprising:

• an operation means database for storing in advance information of means which can be used in operations of working or assembling and attributes of at least accuracy and cost of operations of working or assembling;
• selecting means for selecting information of said means stored in said database in accordance with a shape of an object to be created based on created shape data from said means;
• totaling means for calculating at least one of workability, cost and assembling efficiency of the object by consulting said operation means database based on attributes of the selected means stored in said database;
• a process database for storing a procedure formed by operations;
• and
• shape operation process editing means for executing at least one of processes of addition or deletion of an operation and a change of an order of the operation in said procedure,
• wherein said totaling means determines an evaluation value of an operation of a succeeding part of the order in accordance with a value assigned to an operation at a preceding part of the order, and at least one of workability, cost and assembling efficiency is corrected and calculated from the evaluation value thus determined.