Real-time manufacturing process control monitoring method

• US 6,115,643 A
• Filed: 02/03/1998
• Issued: 09/05/2000
• Est. Priority Date: 02/03/1998
• Status: Expired due to Fees

• Current Assignee: Plexus Services Corporation (Plexus Corporation)
• Original Assignee: MCMS Incorporated (Plexus Corporation)
• Inventors: Tiegs, Michael, Stine, Scott G.
• Primary Examiner(s): Gordon, Paul P.
• Assistant Examiner(s): PATEL, RAMESH B
• Application Number:
  US09/018,076
• Time in Patent Office: 945 Days
• Field of Search: 700/32, 700/104, 700/105, 700/108, 700/109, 700/110, 700/111, 700/115, 714/22, 714/48, 714/57, 714/704, 702/81-84, 702/182-185
• US Class Current: 700/110
• CPC Class Codes: G05B 19/418 Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
• CPC Class Codes: Y02P 90/02 Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Abstract

A method of identifying unacceptable levels of defects in specific sections or work centers of a manufacturing process on a real time basis and initiating corrective action is disclosed. The system allows a user to define defect tolerances or thresholds for manufacturing work centers, tracks defects at the work centers, compares the level of faults with the tolerances, reports out of tolerance work centers, automatically initiates contact with the appropriate personnel to affect a correction to the out of tolerance work center, and maintains records of corrective actions taken.

Claims

1. A computerized method capable of identifying unacceptable levels of defects in work centers of a manufacturing process on a real time basis and initiating corrective action utilizing a plurality of interconnected, computerized work centers, comprising:

storing thresholds for each of a plurality of defects in a database;

receiving data indicating the occurrence at a monitored area of at least one of the defects;

maintaining a count of the occurrences of said at least one of the defects;

comparing the count of the occurrences of the defects with the stored defect thresholds; and

generating an indication when the count of the occurrences of the defects exceeds a stored defect threshold.

2. The method of claim 1, further including generating a graphical user interface to prompt a user at a work center to enter data indicating the occurrence of a defect.

3. A computerized method capable of identifying unacceptable levels of defects in work centers of a manufacturing process on a real time basis and initiating corrective action utilizing a plurality of interconnected, computerized work centers, comprising:

storing thresholds for each of a plurality of defects in a database;

receiving data indicating the occurrence at a monitored area of at least one of the defects;

maintaining a count of the occurrences of said at least one of the defects;

comparing the count of the occurrences of the defects with the stored defect thresholds; and

generating an indication when the count of the occurrences of the defects exceeds a stored defect threshold,

wherein generating an indication includes automatically notifying predetermined personnel that a predetermined tolerance has been exceeded.

4. The method of claim 3, wherein automatically notifying includes sending an e-mail message to predetermined personnel.

5. The method of claim 3, wherein automatically notifying includes paging predetermined personnel.

6. A method of monitoring defects levels during a manufacturing process, comprising:

tracking manufacturing defects at selected locations;

comparing the level of defects occurring at the locations with predetermined tolerances; and

generating an indication when the level of defects at a location exceeds the predetermined tolerance,

wherein the act of generating an indication includes automatically notifying predetermined personnel that a predetermined tolerance has been exceeded.

7. The method of claim 6, wherein the act of automatically notifying includes sending an e-mail message to predetermined personnel.

8. The method of claim 6, wherein the act of automatically notifying includes paging predetermined personnel.

9. The method of claim 6, further comprising maintaining records in a data base of any corrective actions taken in response to the notification.

10. The method of claim 6, additionally comprising creating a data base of tolerances for defects.

11. The method of claim 10, additionally comprising maintaining counts of defects.

12. A method of monitoring and responding to defects detected during a manufacturing process that includes a plurality of interconnected, computerized work centers, comprising:

storing a threshold for a defect in a database;

receiving data indicating the occurrence of the defect at a work center;

maintaining a count of the occurrences of the defect at the work center;

comparing the count of the occurrences of the defect with the stored defect threshold; and

automatically notifying predetermined personnel that the stored defect threshold has been exceeded when the count of the occurrences of the defect exceeds the stored defect threshold.

13. The method of claim 12, further including generating a graphical indication at the work center that the stored defect threshold has been exceeded.

14. The method of claim 12, additionally comprising maintaining records in a data base of any corrective actions taken in response to the notification.

15. A method of monitoring and responding to defects detected during a manufacturing process that includes a plurality of interconnected, computerized work centers, comprising:

storing a threshold for a defect in a database;

receiving data indicating the occurrence of the defect at a work center;

maintaining a count of the occurrences of the defect at the work center;

comparing the count of the occurrences of the defect with the stored defect thresholds; and

automatically notifying predetermined personnel that the stored defect threshold has been exceeded when the count of the occurrences of the defect exceeds the stored defect threshold,

wherein automatically notifying includes sending an e-mail message to at least one predetermined recipient.

16. A method of monitoring and responding to defects detected during a manufacturing process that includes a plurality of interconnected, computerized work centers, comprising:

storing a threshold for a defect in a database;

receiving data indicating the occurrence of the defect at a work center;

maintaining a count of the occurrences of the defect at the work center;

comparing the count of the occurrences of the defect with the stored defect thresholds; and

automatically notifying predetermined personnel that the stored defect threshold has been exceeded when the count of the occurrences of the defect exceeds the stored defect threshold,

wherein automatically notifying includes paging at least one predetermined recipient.