Method for routing and scheduling operations on elements of a work product in a production system

• US 5,243,531 A
• Filed: 09/28/1990
• Issued: 09/07/1993
• Est. Priority Date: 09/28/1990
• Status: Expired due to Term

• Current Assignee: YPG Systems, LLC
• Original Assignee: Volt Information Sciences Incorporated
• Inventors: O'Neill, Thomas J., DiPippo, Gerard L., Sternman, David R., Bialor, Scott P.
• Primary Examiner(s): Smith, Jerry
• Assistant Examiner(s): TRAMMELL, JAMES P
• Application Number:
  US07/589,807
• Time in Patent Office: 1,075 Days
• Field of Search: 364/468, 364/474.11, 364/188-192, 364/474.22, 364/474.24, 364/478, 364/470
• US Class Current: 700/101
• CPC Class Codes: G05B 19/41865 characterised by job scheduling, process planning, material flow
• CPC Class Codes: G06Q 10/06 Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
• 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 for controlling work on a job in a system for producing a plurality of jobs, each of which includes at least one piece of work, each piece of work requiring at least one operation to be performed, the system having several types of stations at which the operations are performed has the following steps. It first accepts into the system a set of job requirements for a job, the set of job requirements including requirements for each of the constituent pieces of work of the job. The method then creates an electronic image of the requirements for each piece of work, the image having a unique image identifier. Next, a set of control information for each piece of work is maintained that includes the unique image identifier and a unique identifier for the pieces of work. Each of the pieces of work are moved among the types of stations at which work on the piece must be performed, and the image of the requirements for one of the pieces of work is presented to the station to which the piece of work with which the image is associated is presented when the piece of work reaches the station.

Claims

1. A method for controlling work on a job in a system for producing a plurality of jobs, each job including at least one piece of work, each piece of work requiring at least one operation to be performed, the system having a plurality of types of stations at which the operations are performed, said method comprising the steps of:

a. accepting into the system a set of job requirements for a job, said set of job requirements including requirements for each of the constituent pieces of work of the job;

b. creating an electronic image of said requirements for each piece of work, said image having a unique image identifier;

c. maintaining a set of control information for each piece of work, said set of control information including said unique image identifier and a unique identifier for the pieces of work;

d. moving each of the pieces of work among the types of stations at which work on the piece must be performed;

e. presenting said image of said requirements for any of the pieces of work to the station to which the piece of work with which said image is associated is presented when the piece of work reaches the station.

2. The method of claim 1 wherein said requirements for each piece of work include a priority for the piece of work and further comprising the steps of:

a. when more than one piece of work is ready for operation at a type of station,

i. creating a queue of the pieces of work for the type of station;

ii. ordering the pieces of work within said queue based on the priorities of the pieces of work;

iii. sequentially presenting each piece of work in said queue to the first station of the type of station that becomes available to operate on the piece.

3. The method of claim 2 further including the steps of:

a. assembling pieces of work together; and

b. maintaining a single set of control information for the assembled pieces of work and allowing the deletion of said control information for each of the pieces of work.

4. The method of claim 2 further comprising the step of changing said priorities for the pieces while the pieces are being processed in the system and reordering the pieces in said queue at each of said stations.

5. The method of claim 2 wherein said control information for each of the pieces of work is contained in a set of data tables and said control information includes a route for each piece of work specifying the types of stations at which operations must be performed on the piece of work and the sequence in which the piece of work is to be moved among the types of stations.

6. The method of claim 5 wherein said route includes branches to more than one station type from a single station type, and further comprising the step of determining the branch that the piece of work follows when the piece of work reaches the station type common to said branches.

7. The method of claim 1 wherein said control information for each of the pieces of work is contained in a set of data tables and said control information includes a route for each piece of work specifying the types of stations at which operations must be performed on the piece of work and the sequence in which the piece of work is to be moved among the types of stations.

8. The method of claim 7 wherein said route includes branches to more than one station type from a single station type, and further comprising the step of determining the branch that the piece of work follows when the piece of work reaches the station type common to said branches.

9. A processor controlling work on a job in a system for producing a plurality of jobs, each job including at least one piece of work, each piece of work requiring at least one operation to be performed, the system having a plurality of types of stations at which the operations are performed, said processor being programmed to carry out the following steps:

a. accepting into the system a set of job requirements for a job, said set of job requirements including requirements for each of the constituent pieces of work of the job;

b. creating an electronic image of said requirements for each piece of work, said image having a unique image identifier;

c. maintaining a set of control information for each piece of work, said set of control information including said unique image identifier and a unique identifier for the piece of work;

d. moving each of the pieces of work among the types of stations at which work on the piece must be performed;

e. presenting said image of said requirements for one of the pieces of work to the station to which the piece of work with which said image is associated is presented when the piece of work reaches the station.

10. A method for controlling work on the trade advertisement in a system for producing a plurality of trade advertisement, each trade advertisement including at least one piece of text work and one piece of art work, each of said piece of text work and said piece of art work requiring at least one operation to be performed, the system having a plurality of types of stations at which the operations are performed, said method comprising the steps of:

a. accepting into the system a copysheet including a set of job requirements for a trade advertisement, said set of job requirements including requirements for each of said piece of text work and said piece of art work;

b. creating an electronic image of said copysheet and assigning a unique image identifier to said image;

c. maintaining a set of control information for each of said piece of text work and said piece of art work, said set of control information including said unique image identifier and a unique identifier for each of said piece of text work and said piece of art work;

d. moving each of said piece of text work and said piece of art work among the types of stations at which work on said pieces must be performed;

e. presenting said image of said copysheet to the station to which said piece of text work or said piece of art work is presented when said piece reaches the station.

11. A method for controlling work on a job in a system for producing a plurality of jobs, each job including at least ne piece of work, each piece of work requiring at least one operation to be performed, the system having a plurality of types of stations at which the operations are performed, said method comprising the steps of:

a. accepting into the system a set of job requirements for a job, aid set of job requirements including requirements for each of the constituent pieces of work of the job, said requirements for each piece of work include a priority for the piece of work;

b. maintaining a set of control information for each piece of work, said set of control information including a unique identifier for the pieces of work;

c. moving each of the pieces of work among the types of stations at which work on the piece must be performed;

d. when more than one piece of work is ready for operation at a type of station,

i. creating a queue of the pieces of work for the type of station;

ii. ordering the pieces of work within said queue based on the priorities of the pieces of work;

iii. sequentially presenting each piece of work in said queue to the first station of the type of station that becomes available to operate on the piece.