Systems and methods for manufacturing a product in a pull and push manufacturing system and associated methods and computer program products for modeling the same

• US 6,983,189 B2
• Filed: 06/14/2002
• Issued: 01/03/2006
• Est. Priority Date: 06/14/2002
• Status: Expired due to Fees

• Current Assignee: The Boeing Co.
• Original Assignee: The Boeing Co.
• Inventors: Lu, Roberto F.
• Primary Examiner(s): Follansbee, John
• Assistant Examiner(s): PEREZ DAPLE, AARON C
• Application Number:
  US10/172,709
• Publication Number:
  US 20030233159A1
• Time in Patent Office: 1,299 Days
• Field of Search: 700 99-102, 700105-107, 700/11, 700/23
• US Class Current: 700/102
• CPC Class Codes: G06Q 10/06 Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling

Abstract

A system of manufacturing a product in a pull and push manufacturing system is provided, where the product comprises at least one model and each model includes at least one component. The system includes an order scheduler, a component scheduler, a make-to-order (MTO) portion and an assemble to order (ATO) portion. The order scheduler is capable of receiving order(s) for model(s) of the product, and the component scheduler is capable of generating a component firing order schedule (CFOS) for the components corresponding to the models ordered. The MTO portion can release each component and thereafter produce the components. And the ATO portion can release each order and thereafter assemble the orders released from the produced components at a number of assembly lines. Advantageously, a number of system parameters can be determined based upon modeling the manufacturing system.

Claims

1. A method of modeling the manufacturing of a product in a pull and push manufacturing system, where the product comprises at least one model and each model includes at least one component, said method comprising:

simulating operation of the manufacturing system, wherein simulating comprises;

generating a master firing order schedule (MFOS) for a plurality of orders for at least one model of the product over a defined time period, wherein the orders are in a predefined sequence and each order includes a defined release time;

generating a component firing order schedule (CFOS) for a plurality of components corresponding to the models ordered in the MFOS, wherein the components are in a predetermined sequence and each component has a defined release time, the predetermined sequence being set based upon the defined release times of the respective orders and manufacturing times associated with the components such that at least one component for an order is capable of being released after at least one component for a subsequent order;

releasing each order in the MFOS at a respective release time and releasing each component in the CFOS at a respective release time;

producing the components at a set number of production centers for the respective set manufacturing times, wherein when a subsequent component is released before all preceding components in the CFOS are produced the subsequent component is buffered until the preceding components are produced; and

assembling the orders from the produced components at a set number of assembly lines for set assembly times associated with the models ordered, wherein when a subsequent order is released before the models in all preceding orders in the MFOS are assembled the subsequent order is buffered until the models in all preceding orders are assembled; and

adjusting at least one of the set assembly time for at least one of the models of the product, the set manufacturing time for at least one of the components of the models, the set number of production centers or the set number of assembly lines based upon at least one of a subsequent component or a subsequent order being buffered.

2. A method according to claim 1 further comprising measuring an efficiency of the system based upon at least one of a number of subsequent components buffered or a number of subsequent orders buffered, wherein measuring the efficiency occurs after assembling the orders, and wherein the adjusting step is based upon the measured efficiency.

3. A method according to claim 2, wherein measuring an efficiency comprises comparing the number of subsequent components buffered to a threshold such that when the number of subsequent components buffered is greater than the threshold the adjusting step comprises at least one of increasing the number of production centers or decreasing the manufacturing times of the respective components.

4. A method according to claim 2, wherein measuring an efficiency comprises comparing the number of subsequent orders buffered to a threshold such that when the number of subsequent orders buffered is greater than a threshold the adjusting step comprises at least one of increasing the number of assembly lines or decreasing the assembly times of the respective models ordered.

5. A method according to claim 1 further comprising measuring an efficiency of the system based upon at least one of an amount of time subsequent components are buffered or an amount of time subsequent orders are buffered, wherein measuring an efficiency occurs after assembling the orders, and wherein the adjusting step is based upon the measured efficiency.

6. A method according to claim 5, wherein measuring an efficiency comprises comparing an amount of time subsequent components are buffered to a threshold such that when subsequent components are buffered for longer than the threshold the adjusting step comprises at least one of increasing the number of production centers or decreasing the manufacturing times of the respective components.

7. A method according to claim 6, wherein measuring an efficiency comprises comparing an amount of time subsequent orders are buffered to a threshold such that when subsequent orders are buffered for longer than the threshold the adjusting step comprises at least one of increasing the number of assembly lines, decreasing the assembly times of the respective models ordered, increasing the number of production centers or decreasing the manufacturing times of the respective components.

8. A method of manufacturing a product in a pull and push manufacturing system, where the product comprises at least one model and each model includes at least one component, said method comprising:

receiving a plurality of orders for at least one model of the product, wherein each model has an associated assembly time, and wherein the orders are in a predefined sequence and each order includes a defined release time;

generating a component firing order schedule (CFOS) for a plurality of components corresponding to the models ordered, wherein the components are in a predetermined sequence and each component has a defined release time, the predetermined sequence being set based upon the defined release times of the respective orders and manufacturing times associated with the components such that at least one component for an order is capable of being released after at least one component for a subsequent order;

releasing each order at a respective release time and releasing each component in the CFOS at a respective release time;

producing the components released at a number of production centers and thereafter assembling the orders released from the produced components at a number of assembly lines, wherein at least one of the assembly times of the models ordered, the manufacturing times of the components of the models ordered, the number of production centers or the number of assembly lines are set;

determining when at least one of a subsequent component or a subsequent order is buffered, wherein determining when a subsequent component is buffered comprises determining when a subsequent component is released before all preceding components in the CFOS are produced, and wherein determining when a subsequent order is buffered comprises determining when a subsequent order is released before the models in all preceding orders received are assembled; and

adjusting at least one of the set assembly time for at least one of the models of the product, the set manufacturing time for at least one of the components of the models, the set number of production centers or the set number of assembly lines based upon at least one of a subsequent component or a subsequent order being buffered.

9. A method according to claim 8 further comprising modeling the system before generating the CFOS, wherein modeling the system comprises:

simulating operation of the system with a set assembly time for each of the models of the product, a set manufacturing time for each of the components of the models, a set number of production centers and a set number of assembly lines, wherein simulating operation of the system occurs for a number of models of the product ordered over a defined time period;

determining when at least one of a subsequent component or a subsequent order is buffered; and

adjusting at least one of the set assembly time for at least one of the models of the product, the set manufacturing time for at least one of the components of the models, the set number of production centers or the set number of assembly lines based upon at least one of a subsequent component or a subsequent order being buffered.

10. A method according to claim 9, wherein modeling the system further includes measuring an efficiency of the system based upon at least one of a number of subsequent components buffered or a number of subsequent orders buffered, wherein measuring the efficiency occurs before the adjusting step, and wherein the adjusting step is based upon the measured efficiency.

11. A method according to claim 10, wherein modeling the system further comprises setting the number of production centers and the manufacturing time associated with each component before simulating operation of the system, wherein measuring an efficiency comprises comparing the number of subsequent orders buffered to a threshold such that when the number of subsequent components buffered is greater than the threshold the adjusting step comprises at least one of increasing the number of production centers or decreasing the manufacturing times of the respective components.

12. A method according to claim 10, wherein modeling the system further comprises setting the number of assembly lines and the assembly time associated with each model of the product, wherein measuring an efficiency comprises comparing the number of subsequent orders buffered to a threshold such that when the number of subsequent orders buffered is greater than the threshold the adjusting step comprises at least one of increasing the number of assembly lines or decreasing the assembly times of the respective models ordered.

13. A method according to claim 9 wherein modeling the system further includes measuring an efficiency of the system based upon at least one of an amount of time subsequent components are buffered or an amount of time subsequent orders are buffered, wherein measuring the efficiency occurs before the adjusting step, and wherein the adjusting step is based upon the measured efficiency.

14. A method according to claim 13, wherein modeling the system further comprises setting the number of production centers and the manufacturing time associated with each component before simulating operation of the system, wherein measuring an efficiency comprises comparing an amount of time subsequent orders are buffered to a threshold such that when subsequent components are buffered for longer than the threshold the adjusting step comprises at least one of increasing the number of production centers or decreasing the manufacturing times of the respective components.

15. A method according to claim 14, wherein modeling the system further comprises setting the number of assembly lines and the assembly time associated with each model of the product, wherein measuring an efficiency comprises comparing an amount of time subsequent orders are buffered to a threshold such that when subsequent orders are buffered for longer than the threshold the adjusting step comprises at least one of increasing the number of assembly lines, decreasing the assembly times of the respective models ordered, increasing the number of production centers or decreasing the manufacturing times of the respective components.

16. A system of manufacturing a product in a pull and push manufacturing system, where the product comprises at least one model and each model includes at least one component, said system comprising:

an order scheduler capable of receiving a plurality of orders for at least one model of the product, wherein each model has an associated assembly time, and wherein the orders are in a predefined sequence and each order includes a defined release time;

a component scheduler capable of generating a component firing order schedule (CFOS) for a plurality of components corresponding to the models ordered, wherein the components are in a predetermined sequence and each component has a defined release time, the predetermined sequence being set based upon the defined release times of the respective orders and manufacturing times associated with the components such that at least one component for an order is capable of being released after at least one component for a subsequent order;

a make-to-order (MTO) portion capable of releasing each component in the CFOS at a respective release time and thereafter producing the components released at a number of production centers;

an assemble-to-order (ATO) portion capable of releasing each order at a respective release time and thereafter assembling the orders released from the produced components at a number of assembly lines,

wherein at least one of the assembly times of the models ordered, the manufacturing times of the components of the models ordered, the number of production centers or the number of assembly lines are set; and

a processing element capable of determining when at least one of a subsequent component or a subsequent order is buffered, wherein said processing element is capable of adjusting at least one of the set assembly time for at least one of the models of the product, the set manufacturing time for at least one of the components of the models, the set number of production centers or the set number of assembly lines based upon at least one of a subsequent component or a subsequent order being buffered.

17. A system according to claim 16, wherein said processing element is capable of modeling the system before said component scheduler generates the CFOS, wherein said processing element is capable of modeling the system by simulating operation of the system with a set assembly time for each of the models of the product, a set manufacturing time for each of the components of the models, a set number of production centers and a set number of assembly lines, and wherein said processing element is capable of simulating operation of the system for a number of models of the product ordered over a defined time period.

18. A system according to claim 17, wherein said processing element is also capable of measuring an efficiency of the system based upon at least one of a number of subsequent components buffered or a number of subsequent orders buffered, and wherein said processing element is capable of adjusting at least one of the set assembly time for at least one of the models of the product, the set manufacturing time for at least one of the components of the models, the set number of production centers or the set number of assembly lines based upon the measured efficiency.

19. A system according to claim 18, wherein said processing element is capable of further modeling the system by setting the number of production centers and the manufacturing time associated with each component before simulating operation of the system, wherein said processing element is capable of measuring an efficiency by comparing the number of subsequent orders buffered to a threshold such that when the number of subsequent components buffered is greater than the threshold said processing element can at least one of increase the number of production centers or decrease the manufacturing times of the respective components.

20. A system according to claim 18, wherein said processing element is capable of further modeling the system by setting the number of assembly lines and the assembly time associated with each model of the product, wherein said processing element is capable of measuring an efficiency by comparing the number of subsequent orders buffered to a threshold such that when the number of subsequent orders buffered is greater than the threshold said processing element can at least one of increase the number of assembly lines or decrease the assembly times of the respective models ordered.

21. A system according to claim 17 wherein said processing element is capable of further modeling the system by measuring an efficiency of the system based upon at least one of an amount of time subsequent components are buffered or an amount of time subsequent orders are buffered, and wherein said processing element is capable of adjusting at least one of the set assembly time for at least one of the models of the product, the set manufacturing time for at least one of the components of the models, the set number of production centers or the set number of assembly lines based upon the measured efficiency.

22. A system according to claim 21, wherein said processing element is capable of further modeling the system by setting the number of production centers and the manufacturing time associated with each component before simulating operation of the system, wherein said processing element is capable of measuring an efficiency by comparing an amount of time subsequent orders are buffered to a threshold such that when subsequent components are buffered for longer than the threshold said processing element can at least one of increase the number of production centers or decrease the manufacturing times of the respective components.

23. A system according to claim 22, wherein said processing element is capable of further modeling the system by setting the number of assembly lines and the assembly time associated with each model of the product, wherein said processing element is capable of measuring an efficiency by comparing an amount of time subsequent orders are buffered to a threshold such that when subsequent orders are buffered for longer than the threshold said processing element can at least one of increase the number of assembly lines, decrease the assembly times of the respective models ordered, increase the number of production centers or decrease the manufacturing times of the respective components.

24. A computer program product for modeling the manufacturing of a product in a pull and push manufacturing system, where the product comprises at least one model and each model includes at least one component, said computer program product comprising a computer-readable storage medium having computer-readable program code portions stored therein, the computer-readable program portions comprising:

a first executable portion for simulating operation of the manufacturing system, wherein said first executable portion simulates the operation by;

generating a master firing order schedule (MFOS) for a plurality of orders for models of the product over a defined time period, wherein the orders are in a predefined sequence and each order includes a defined release time;

generating a component firing order schedule (CFOS) for a plurality of components corresponding to the models ordered in the MFOS, wherein the components are in a predetermined sequence and each component has a defined release time, the predetermined sequence being set based upon the defined release times of the respective orders and manufacturing times associated with the components such that at least one component for an order is capable of being released after at least one component for a subsequent order;

releasing each order in the MFOS at a respective release time and releasing each component in the CFOS at a respective release time;

producing the components at a set number of production centers for the respective set manufacturing times, wherein when a subsequent component is released before all preceding components in the CFOS are produced the subsequent component is buffered until the preceding components are produced; and

assembling the orders from the produced components at a set number of assembly lines for set assembly times associated with the models ordered, wherein when a subsequent order is released before the models in all preceding orders in the MFOS are assembled the subsequent order is buffered until the models in all preceding orders are assembled; and

a second executable portion for adjusting at least one of the set assembly time for at least one of the models of the product, the set manufacturing time for at least one of the components of the models, the set number of production centers or the set number of assembly lines based upon at least one of a subsequent component or a subsequent order being buffered.

25. A computer program product according to claim 24 further comprising a third executable portion for measuring an efficiency of the system based upon at least one of a number of subsequent components buffered or a number of subsequent orders buffered, wherein said third executable portion measures the efficiency after said first executable portion assembles the orders, and wherein said second executable portion adjusts at least one of the set assembly time for at least one of the models of the product, the set manufacturing time for at least one of the components of the models, the set number of production centers or the set number of assembly lines based upon the measured efficiency.

26. A computer program product according to claim 25, wherein said third executable portion measures the efficiency by comparing the number of subsequent components buffered to a threshold such that when the number of subsequent components buffered is greater than the threshold said second executable portion can at least one of increase the number of production centers or decrease the manufacturing times of the respective components.

27. A computer program product according to claim 25, wherein said third executable portion measures the efficiency by comparing the number of subsequent orders buffered to a threshold such that when the number of subsequent orders buffered is greater than a threshold said second executable portion can at least one of increase the number of assembly lines or decrease the assembly times of the respective models ordered.

28. A computer program product according to claim 24 further comprising a third executable portion capable of measuring an efficiency of the system based upon at least one of an amount of time subsequent components are buffered or an amount of time subsequent orders are buffered, wherein said third executable portion measures the efficiency occurs after said first executable portion assembles the orders, and wherein the adjusting step is based upon the measured efficiency.

29. A computer program product according to claim 28, wherein measuring an efficiency comprises comparing an amount of time subsequent components are buffered to a threshold such that when subsequent components are buffered for longer than the threshold said second executable portion can at least one of increase the number of production centers or decrease the manufacturing times of the respective components.

30. A computer program product according to claim 29, wherein said third executable portion can measure the efficiency by comparing an amount of time subsequent orders are buffered to a threshold such that when subsequent orders are buffered for longer than the threshold said second executable portion can at least one of increase the number of assembly lines, decrease the assembly times of the respective models ordered, increase the number of production centers or decrease the manufacturing times of the respective components.