US5748478A
Expired / Lapsed
US
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Output management of processing in a manufacturing plant
Assignee: Vanguard International Semiconductor Corp
•
Filing: 1997-03-17
•
Granted: 1998-05-05
•
Expires: 2017-03-17
Abstract
Abstract A method of output management of processing in a manufacturing plant with a plurality of stages during a running period. The method begins with the step of determining the stage In Flow of Work In Process (WIP) in the plant, determining the Out Flow of WIP in the plant, and calculating Flow Intensity of the plant, followed by calculating the equipment Capacity of the plant. The next steps are to calculate Equipment Capacity allocation of the plant, determine the bottleneck Stage Capacity of stages in the plant, determine the Rolling Output of the plant, followed by calculation of the Remaining Work In Process of the plant. Data on the Daily Output is collected. Remaining Work In Process is duplicated as Initial WIP for the next day. Testing is made to determine whether the running period has ended, and until the running period has ended, the method repeatedly loops back to the In Flow step.
Inventors
- 👤 Yirn-Sheng Pan
- 👤 Horng-Huei Tseng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:13
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/418; G05B19/41865; G05B2219/00; G05B2219/30; G05B2219/31; G05B2219/31413; G05B2219/31429; Y; Y02; Y02P; Y02P90/00; Y02P90/02
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
170 words
A method of output management of processing in a manufacturing plant with a plurality of stages during a running period comprises the steps as follows: a) determine the stage In Flow (IF ij ) of Work In Process (WIP) in said plant, b) determine the Out Flow (OF ij ) of Work In Process (WIP) in said plant, c) calculate Flow Intensity (FL ij ) of said plant, d) calculate plant equipment Capacity (C ij ), e) calculate Equipment Capacity allocation (EC ij ) of said plant, f) determine the bottleneck Stage Capacity (SC ij ) of stages in said plant, g) determine the Rolling Output (O ij ) of said plant, h) calculate plant Remaining Work In Process (RW ij ), i) collect Daily Output (DO j ), j) duplicate Remaining Work In Process (RW ij ) as Initial WIP (W ij ) for next day, k) testing to determine whether said running period has ended and repeatedly looping back to step (a) until said running period has ended.
Claim 2
Independent Claim
170 words
A method of output management of processing in a manufacturing plant with a plurality of stages during a running period comprises the steps as follows: a) determine the stage In Flow (IF ij ) of Work In Process (WIP) in said plant, b) determine the Out Flow (OF ij ) of Work In Process (WIP) in said plant, c) calculate Flow Intensity (FL ij ) of said plant, d) calculate plant equipment Capacity (C ij ), e) calculate Equipment Capacity allocation (EC ij ) of said plant, f) determine the bottleneck Stage Capacity (SC ij ) of stages in said plant, g) determine the Rolling Output (O ij ) of said plant, h) calculate plant Remaining Work In Process (RW ij ), i) collect Daily Output (DO j ), j) duplicate Remaining Work In Process (RW ij ) as Initial WIP (W ij ) for next day, k) testing to determine whether said running period has ended and repeatedly looping back to step (a) until said running period has ended.
Claim 3
Dependent Claim
37 words
A method in accordance with claim 1 wherein In Flow (IF ij ) is calculated with the formula, as follows: ##EQU19## while Stage "s" meets ##EQU20## where: i=Stage Number=1,2, , , N; j=Part Number=1,2, , , P.
Claim 4
Dependent Claim
37 words
A method in accordance with claim 1 wherein Out Flow (OF ij ) is calculated with the formula, as follows: ##EQU21## while Stage "m" meets ##EQU22## where i=Stage Number=1,2, , , N; j=Part Number=1,2, , , P.
Claim 5
Dependent Claim
16 words
A method in accordance with claim 1 wherein stage flow intensity is calculated as follows: ##EQU23##
Claim 6
Dependent Claim
51 words
A method in accordance with claim 1 wherein Equipment Capacity (C i ) is calculated as follows: C.sub.i =NO.sub.i ×POH.sub.i ×AV.sub.i ×EFF.sub.i where: POH i =ith equipment POH AV i =ith equipment Availability Ratio EFF i =ith equipment Efficiency Ratio NO i =ith equipment number i=Equipment 1,2, , , , M.
Claim 7
Dependent Claim
53 words
A method in accordance with claim 1 wherein the Equipment Capacity Allocation to Recipes EC kij is calculated as follows: ##EQU24## where: k=Recipe Number in stage i=1,2, , , R; i=Stage Number=1,2, , , N; j=Part Number=1,2, , , P; Y=set of recipes and their equipment are the same x=Recipe Equipment ε=Belongs to.
Claim 8
Dependent Claim
39 words
A method in accordance with claim 1 wherein the bottleneck Stage Capacity (SC ij ) is calculated as follows: SC.sub.ij =MIN {EC.sub.kij } where: i=Stage Number=1,2, , , N; j=Part Number=1,2, , , P; k=recipe number in stage i.
Claim 9
Dependent Claim
42 words
A method in accordance with claim 1 wherein the Rolling Output (O ij ) is calculated as follows: O.sub.ij =SC.sub.ij if (W.sub.ij +1/2O.sub.(i-1)j >SC.sub.ij O.sub.ij =W.sub.ij +1/2O.sub.(i-1)j if (W.sub.ij +1/2O.sub.(i-1)j ≦SC.sub.ij where: i=Stage Number=1,2, , , N; j=Part Number=1,2, , , P.
Claim 10
Dependent Claim
33 words
A method in accordance with claim 1 wherein the Remaining WIP (RW ij ) is calculated as follows: RW.sub.ij =W.sub.ij ×).sub.(i-1)j -O.sub.ij where i=Stage Number=1,2, , , N; j=Part Number=1,2, , , P.
Claim 11
Dependent Claim
64 words
A method in accordance with claim 1 wherein In Flow (IF ij is calculated with the formula, as follows: ##EQU25## while Stage "s" meets ##EQU26## where i=Stage Number=1,2, , , N; j=Part Number=1,2, , , P, and said Out Flow (OF ij ) is calculated, as follows: ##EQU27## while Stage "m" meets ##EQU28## where i=Stage Number=1,2, , , N; j=Part Number=1,2, , , P.
Claim 12
Dependent Claim
16 words
A method in accordance with claim 10 wherein stage flow intensity is calculated as follows: ##EQU29##
Claim 13
Dependent Claim
50 words
A method in accordance with claim 11 wherein Equipment Capacity (C i ) is calculated as follows: C.sub.i =NO.sub.i ×POH.sub.i ×AV.sub.i ×EFF.sub.i where POH i =ith equipment POH AV i =ith equipment Availability Ratio EFF i =ith equipment Efficiency Ratio NO i =ith equipment number i=Equipment 1,2, , , M.
Claim 14
Dependent Claim
53 words
A method in accordance with claim 12 wherein the Equipment Capacity Allocation to Recipes EC kij is calculated as follows: ##EQU30## where k=Recipe Number in stage i=1,2, , , R; i=Stage Number=1,2, , , N; j=Part Number=1,2, , , P; Y=set of recipes and their equipment are the same x=Recipe Equipment ε=Belongs to.
Claim 15
Dependent Claim
38 words
A method in accordance with claim 13 wherein the bottleneck Stage Capacity (SC ij ) is calculated as follows: SC.sub.ij =MIN{EC.sub.kij } where i=Stage Number=1,2, , , N; j=Part Number=1,2, , , P; k=recipe number in stage i.
Claim 16
Dependent Claim
42 words
A method in accordance with claim 14 wherein the Rolling Output (O ij ) is calculated as follows: O.sub.ij =SC.sub.ij if (W.sub.ij +1/2O.sub.(i-1)j >SC.sub.ij O.sub.ij =W.sub.ij +1/2O.sub.(i-1)j if (W.sub.ij +1/2O.sub.(i-1)j ≦SC.sub.ij where i=Stage Number=1,2, , , N; j=Part Number=1,2, , , P.
Claim 17
Dependent Claim
33 words
A method in accordance with claim 15 wherein the Remaining WIP (RW ij ) is calculated as follows: RW.sub.ij =W.sub.ij ×O.sub.(i-1)j -O.sub.ij where i=Stage Number=1,2, , , N; j=Part Number=1,2, , , P.
Claim 18
Independent Claim
194 words
A system for output management of processing in a manufacturing plant with a plurality of stages during a running period, comprising the functions as follows: a) means for determining the stage In Flow (IF ij of Work In Process (WIP) in said plant, b) means for determining the Out Flow (OF ij ) of Work In Process (WIP) in said plant, c) means for calculating Flow Intensity (FL ij ) of said plant, d) means for calculating equipment Capacity (C ij ) of said plant, e) means for calculating Equipment Capacity allocation (EC ij ) of said plant, f) means for determining the bottleneck Stage Capacity (SC ij ) of stages in said plant, g) means for determining the Rolling Output (O ij ) of said plant, h) means for calculating Remaining Work In Process (RW ij ) of said plant, i) means for collecting Daily Output (DO j ), j) means for duplicating Remaining Work In Process (RW ij ) as Initial WIP (W ij ) for next day, k) means for testing to determine whether said running period has ended and repeatedly looping back to (a) until said running period has ended.
Claim 19
Independent Claim
194 words
A system for output management of processing in a manufacturing plant with a plurality of stages during a running period, comprising the functions as follows: a) means for determining the stage In Flow (IF ij of Work In Process (WIP) in said plant, b) means for determining the Out Flow (OF ij ) of Work In Process (WIP) in said plant, c) means for calculating Flow Intensity (FL ij ) of said plant, d) means for calculating equipment Capacity (C ij ) of said plant, e) means for calculating Equipment Capacity allocation (EC ij ) of said plant, f) means for determining the bottleneck Stage Capacity (SC ij ) of stages in said plant, g) means for determining the Rolling Output (O ij ) of said plant, h) means for calculating Remaining Work In Process (RW ij ) of said plant, i) means for collecting Daily Output (DO j ), j) means for duplicating Remaining Work In Process (RW ij ) as Initial WIP (W ij ) for next day, k) means for testing to determine whether said running period has ended and repeatedly looping back to (a) until said running period has ended.
Claim 20
Dependent Claim
37 words
A system in accordance with claim 17 wherein In Flow (IF ij ) is calculated with the formula, as follows: ##EQU31## while Stage "s" meets ##EQU32## where: i=Stage Number=1,2, , , N; j=Part Number=1,2, , , P.
Claim 21
Dependent Claim
39 words
A system in accordance with claim 17 wherein Out Flow (OF ij ) is calculated with the formula, as follows: ##EQU33## while Stage "m" meets ##EQU34## where i=Stage Number=1,2, , , , N; j=Part Number=1,2, , , , P.
Claim 22
Dependent Claim
16 words
A system in accordance with claim 17 wherein stage flow intensity is calculated as follows: ##EQU35##
Claim 23
Dependent Claim
51 words
A system in accordance with claim 17 wherein Equipment Capacity (C i ) is calculated as follows: C.sub.i =NO.sub.i ×POH.sub.i ×AV.sub.i ×EFF.sub.i where POH i =ith equipment POH AV i =ith equipment Availability Ratio EFF i =ith equipment Efficiency Ratio NO i =ith equipment number i=Equipment 1,2, , , , M.
Claim 24
Dependent Claim
56 words
A system in accordance with claim 17 wherein the Equipment Capacity Allocation to Recipes EC kij is calculated as follows: ##EQU36## where k=Recipe Number in stage i=1,2, , , , R; i=Stage Number=1,2, , , , N; j=Part Number=1,2, , , , P; Y=set of recipes and their equipment are the same x=Recipe Equipment ε=Belongs to.
Claim 25
Dependent Claim
38 words
A system in accordance with claim 17 wherein the bottleneck Stage Capacity (SC ij ) is calculated as follows: SC.sub.ij =MIN{EC.sub.kij } where i=Stage Number=1,2, , , N; j=Part Number=1,2, , , P; k=recipe number in stage i.
Claim 26
Dependent Claim
43 words
A system in accordance with claim 17 wherein the Rolling Output (O ij ) is calculated as follows: O.sub.ij =SC.sub.ij if (W.sub.ij +1/2O.sub.(i-1)j >SC.sub.ij O.sub.ij =W.sub.ij +1/2O.sub.(i-1)j ; if (W.sub.ij +1/2O.sub.(i-1)j ≦SC.sub.ij where i=Stage Number=1,2, , , N; j=Part Number=1,2, , , P.
Claim 27
Dependent Claim
33 words
A system in accordance with claim 17 wherein the Remaining WIP (RW ij ) is calculated as follows: RW.sub.ij =W.sub.ij ×O.sub.(i-1)j -O.sub.ij where i=Stage Number=1,2, , , N; j=Part Number=1,2, , , P.
Claim 28
Dependent Claim
57 words
A system in accordance with claim 17 wherein In Flow (IF ij ) is calculated with the formula, as follows: ##EQU37## while Stage "s" meets ##EQU38## and said Out Flow (OF ij ) is calculated with the formula, as follows: ##EQU39## while Stage "m" meets ##EQU40## where i=Stage Number=1,2, , , N; j=Part Number=1,2, , , P.
Claim 29
Dependent Claim
16 words
A system in accordance with claim 26 wherein stage flow intensity is calculated as follows: ##EQU41##
Claim 30
Dependent Claim
50 words
A system in accordance with claim 27 wherein Equipment Capacity (C i ) is calculated as follows: C.sub.i =NO.sub.i ×POH.sub.i ×AV.sub.i ×EFF.sub.i where i=Equipment 1,2, , , M POH i =ith equipment POH AV i =ith equipment Availability Ratio EFF i =ith equipment Efficiency Ratio NO i =ith equipment number.
Claim 31
Dependent Claim
53 words
A system in accordance with claim 28 wherein the Equipment Capacity Allocation to Recipes EC kij is calculated as follows: ##EQU42## where k=Recipe Number in stage i=1,2, , , R; i=Stage Number=1,2, , , N; j=Part Number=1,2, , , P; Y=set of recipes and their equipment are the same x=Recipe Equipment ε=Belongs to.
Claim 32
Dependent Claim
38 words
A system in accordance with claim 29 wherein the bottleneck Stage Capacity (SC kij ) is calculated as follows: SC.sub.ij =MIN{EC.sub.kij } where i=Stage Number=1,2, , , N; j=Part Number=1,2, , , P; k=recipe number in stage i.
Claim 33
Dependent Claim
44 words
A system in accordance with claim 30 wherein the Rolling Output (O ij ) is calculated as follows: O.sub.ij =SC.sub.ij ; if (W.sub.ij +1/2O.sub.(i-1)j >SC.sub.ij O.sub.ij =W.sub.ij +1/2O.sub.(i-1)j ; if (W.sub.ij +1/2O.sub.(i-1)j ≦SC.sub.ij where i=Stage Number=1,2, , , N; j=Part Number=1,2, , , P.
Claim 34
Dependent Claim
32 words
A system in accordance with claim 31 wherein the Remaining WIP (RW ij ) is calculated as follows: RW.sub.ij =W.sub.ij ×O.sub.(i-1)j-O.sub.ij where i=Stage Number=1,2, , , N; j=Part Number=1,2, , , P.
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| 3.5 Years (Year 4) | 2001-05-04 | 2001-11-03 | 2002-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-05-04 | 2005-11-03 | 2006-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-05-04 | 2009-11-03 | 2010-05-05 | $7700.00 | Window Closed / Lapsed |