US 6,662,065 B2 · Method of monitoring manufacturing apparatus

Abstract

When the operation of any of manufacturing apparatus is halted, influence exerted by the operation halt on the manufacturing state of each of products is evaluated based on the difference between the number of products in a processing waiting state in the manufacturing apparatus at a time at which the operation of the manufacturing apparatus is halted or at a time antecedent thereto and the number of products in the processing waiting state in the manufacturing apparatus at a time at which the manufacturing apparatus is reoperated after the operation thereof is halted or at a time posterior thereto or on the difference between the period during which the product processed by the manufacturing apparatus during a given period antecedent to the time at which the operation of the manufacturing apparatus is halted is in the processing waiting state in the manufacturing apparatus and the period during which the product processed by the manufacturing apparatus during the given period posterior to the time at which the manufacturing apparatus is reoperated after the operation thereof is halted is in the processing waiting state in the manufacturing apparatus.

Claims11

Dependent claims

A method for evaluating a manufacturing line that sequentially processes a product using a plurality of manufacturing apparatuses to manufacture the product, the method evaluating an influence, which is caused by a halting of any of the manufacturing apparatuses, on the manufacturing line as a halt influence, the method comprising the step of:

evaluating the halt influence based on a difference between a first number of processing waiting products and a second number of processing waiting products, the first number of processing waiting products being a number of products in a processing waiting state in the halted manufacturing apparatus at a time when or before the halted manufacturing apparatus is being halted, the second number of processing waiting products being a number of products in the processing waiting state in the halted manufacturing apparatus at a time when or after the halted manufacturing apparatus resumes operation.

calculating a first degree of influence based on the difference in value between the first number of processing waiting products and the second number of processing waiting products, the first number of processing waiting products being a number of products in a processing waiting state in the halted manufacturing apparatus at a time when or before the halted manufacturing apparatus is being halted, the second number of processing waiting products being a number of products in the processing waiting state in the halted manufacturing apparatus at a time when or after the halted manufacturing apparatus resumes operation;
calculating a second degree of influence based on the difference in value between the first processing waiting period and the second processing waiting period, the first processing waiting period being a period in which a product, processed by the halted manufacturing apparatus during a given period when or before the halted manufacturing apparatus is being halted, is in a processing waiting state in the halted manufacturing apparatus, the second processing waiting period being a period in which a product, processed by the halted manufacturing apparatus during a given period when or after the halted manufacturing apparatus resumes operation, is in the processing waiting state in the halted manufacturing apparatus;
and
evaluating the halt influence based on the first and second degrees of influence.

1 more element

Dependencies are inferred from the claim text.

Method of monitoring manufacturing apparatus

Life of this patent

Method of monitoring manufacturing apparatus

Life of this patent

Abstract

Claims11