Capacity loss control method for preventative maintenance in IC plant
First Claim
1. A method of operating a manufacturing plant subsequent to preventative maintenance steps, comprising the following steps:
- providing a data processing system having memory means for data storage,providing central processing means for (a) accessing data from said memory means, (b) receiving data from data input means and (c) supplying data to said memory means,providing Preventive Maintenance (PM) Duration (D) data to said data processing system,calculating the effect of a PM schedule upon the efficiency of operation of the plant, andproviding a new PM schedule to improve said efficiency of operation of said plant.
2 Assignments
0 Petitions
Accused Products
Abstract
A process is provided for operating a manufacturing plant subsequent to preventative maintenance steps. The steps of the process are the following. Provide a data processing system having memory means for data storage. Provide central processing means for (a) accessing data from the memory means, (b) receiving data from data input means and (c) supplying data to the memory means. Provide Preventive Maintenance (PM) Duration (D) data to the data processing system. Calculate the effect of a PM schedule upon the efficiency of operation of the plant. Provide a new PM schedule to improve the efficiency of operation of the plant.
27 Citations
16 Claims
-
1. A method of operating a manufacturing plant subsequent to preventative maintenance steps, comprising the following steps:
-
providing a data processing system having memory means for data storage, providing central processing means for (a) accessing data from said memory means, (b) receiving data from data input means and (c) supplying data to said memory means, providing Preventive Maintenance (PM) Duration (D) data to said data processing system, calculating the effect of a PM schedule upon the efficiency of operation of the plant, and providing a new PM schedule to improve said efficiency of operation of said plant. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A method of operating a manufacturing plant subsequent to preventative maintenance steps, comprising the following steps:
-
providing a data processing system having memory means for data storage, providing central processing means for (a) accessing data from said memory means, (b) receiving data from data input means and (c) supplying data to said memory means, providing Preventive Maintenance (PM) Duration (D) data to said data processing system, calculating allowable duration of a preventative maintenance (PM) step, calculating Maximum Allowable PM Duration (MAD) of all steps after said PM step, determining whether MAD>
D, and then(a) if MAD>
D, then calculate capacity loss (L), and determine whether L is acceptable,(b) if L is not acceptable, then prompt for a new PM plan, read new WIP distribution (Wn), and branch back to calculate MAD and recycle through the process, (c) if L is acceptable, then END said process, (d) if MAD≦
D, then prompt for a new PM plan and branch back to calculate MAD and recycle through the process.
-
-
9. A production scheduling system for operating a manufacturing plant subsequent to preventative maintenance steps, comprising:
-
a data processing system having memory means for data storage, central processing means comprising; (a) means for accessing data from said memory means, (b) means for receiving data from data input means and (c) means for supplying data to said memory means, means for providing Preventive Maintenance (PM) Duration (D) data to said data processing system, means for calculating the effect of a PM schedule upon the efficiency of operation of the plant, and means for providing a new PM schedule to improve said efficiency of operation of said plant. - View Dependent Claims (10, 11, 12, 13, 14, 15)
-
-
16. A production scheduling system for operating a manufacturing plant subsequent to preventative maintenance steps, comprising the following steps:
-
a data processing system having memory means for data storage, central processing means for (a) accessing data from said memory means, (b) receiving data from data input means and (c) supplying data to said memory means, means for providing a Preventive Maintenance (PM) Duration (D) data to said data processing system, calculating allowable duration of a preventative maintenance (PM) step, means for calculating Maximum Allowable PM Duration (MAD) of all steps after said PM step, means for determining whether MAD>
D, and then(a) if MAD>
D, then calculate capacity loss (L), and determine whether L is acceptable,(b) if L is not acceptable, then prompt for a new PM plan, read new WIP distribution (Wn), and branch back to calculate MAD and recycle through the process, (c) if L is acceptable, then END said process, (d) if MAD≦
D, then prompt for a new PM plan and branch back to calculate MAD and recycle through the process.
-
Specification