Fraction defective estimating method, system for carrying out the same and recording medium

A method of estimating a fraction defective of an article which is manufactured by assembling a plurality of constituent parts, said method comprising the steps of:

• inputting information relating to an attaching operation in a process of manufacturing said article by assembling constituent parts, information relating attachment-destined parts and representing properties of the attachment-destined parts which are attached based on said attaching operation, and information relating to attachment-subjected parts and representing properties of relevant attachment-subjected parts for said attachment-destined parts;
• extracting a fraction defective coefficient based on said information relating to the attachment-destined parts from a storage device in which the fraction defective coefficient corresponding to the properties for each attachment-destined part is previously stored;
• extracting a first fraction defective supplementary coefficient based on said information relating to said attaching operation and a second fraction defective supplementary coefficient based on said attachment-subjected parts from a storage device in which a fraction defective supplementary coefficient for each attaching operation is previously stored;
• and
• subjecting said fraction defective coefficient for each attachment-destined part which has been extracted to a supplementary operation based on said first and second fraction defective supplementary coefficients to determine arithmetically fraction defective for each attachment-destined part.

A method of estimating a fraction defective of an article which is manufactured by assembling a plurality of constituent parts, said method comprising the steps of:

• inputting information relating to an attaching operation in a process of manufacturing said article by assembling constituent parts, information relating to attachment-destined parts and representing properties of the attachment-destined parts which are attached based on said attaching operation, and information relating to attachment-subjected parts and representing properties of attachment-subjected parts for said attachment-destined parts;
• extracting a fraction defective coefficient based on said information relating to said attaching operation from a stored device in which the fraction defective coefficient for each standard attaching operation is previously stored;
• extracting a first fraction defective supplementary coefficient based on said information relating to the attachment-destined parts and a second fraction defective supplementary coefficient based on said information relating to the attachment-subjected parts from a storage device in which the fraction defective supplementary coefficient for each part is previously stored;
• and
• subjecting said fraction defective coefficient for each attaching operation which has been extracted to the supplementary operation based on said first and second fraction defective supplementary coefficients to determine arithmetically the fraction defective coefficient for each attaching operation or for each attachment-destined part relating to a relevant attaching operation.