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Articles 1 - 9 of 9
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Benchmark Production Scheduling Problems For Job Shops With Interactive Constraints, Stewart W. James, Bruno A. Mediate Jr.
Benchmark Production Scheduling Problems For Job Shops With Interactive Constraints, Stewart W. James, Bruno A. Mediate Jr.
Theses and Dissertations
United States Air Force (USAF) depots have expressed interest in utilizing DISASTER production scheduling software to schedule their maintenance operations. DISASTER attempts to increase system throughput by building effective schedules for system, constraint resources. However, when a system contains multiple, interactive constraints, DISASTER builds the constraint schedules one at a time. Since each successive schedule must adhere to timing restrictions imposed by previous constraint schedules, the quality of the schedules produced by DISASTER is dependent upon the sequence in which the constraints are scheduled. This thesis first developed a set of benchmark problems which provide a diversity of scheduling scenarios. …
An Investigation Of Integrated Product Development Teams Of The F-22 Program, Gary F. Wagner, Randall L. White
An Investigation Of Integrated Product Development Teams Of The F-22 Program, Gary F. Wagner, Randall L. White
Theses and Dissertations
This study investigated Integrated Product Development (IPD) at the F-22 System Program Office (SPO). A literature review revealed the key IPD characteristics of organizational structure, communication, intense up-front planning, training, integrated management tools, and lessons learned. The research method was twenty-two personal interviews of SPO subjects selected from four IPD teams, the front office, and functional support divisions. Key findings included an emphasis on up-front planning to establish an organizational and contractual structure which empowered workers to develop their products. Also, constant communication with all other functions and teams was stressed while training was primarily done while transitioning to IPD. …
Research And Development Project Selection Tools: Probing Wright Laboratory's Project Selection Methods And Decision Criteria Using The Lateral Airfoil Concept, James E. Barger
Theses and Dissertations
This research accomplished three major tasks. First it examined familiarity and usage rates for fifteen published R&D project selection methods in the context of a larger general issue, the Air Force's ability to develop and exploit technology. Wright Laboratory served as the focus for the research effort and displayed a greater tendency to use formal methods in 1993 than was shown in prior research. The laboratory's overall preference for simpler models like Checklist, Scoring, and Sorting led to a recommendation that authors familiar with the other techniques communicate them in engineering and management vernacular. Secondly, the study introduced a technological …
Schedule Estimating Relationships For The Engineering And Manufacturing Development Of Bomber, Transport, Tanker And Surveillance Aircraft Systems, D. Scott Boyd, Brian D. Mundt
Schedule Estimating Relationships For The Engineering And Manufacturing Development Of Bomber, Transport, Tanker And Surveillance Aircraft Systems, D. Scott Boyd, Brian D. Mundt
Theses and Dissertations
This study developed parametric schedule estimating relationships (SERs) for the engineering and manufacturing development (EMD) phase for nontactical aircraft systems. The potential value of this nontraditional approach to estimating schedule duration has been established by previous applications to tactical aircraft, air-launched munitions, and office buildings. Prior research suggested acquisition strategy parameters to be significant schedule drivers. For this study, data on EMD milestone dates and potential schedule drivers were collected on 56 bomber, transport, tanker, and surveillance aircraft systems. Several SERs were developed for these systems using linear regression analysis. The EMD phase was divided into subphases based on significant …
Pollution Prevention Incentives For Major Weapon System Programs, Donna C. Heinz, Dudley C. Wireman
Pollution Prevention Incentives For Major Weapon System Programs, Donna C. Heinz, Dudley C. Wireman
Theses and Dissertations
This research was undertaken to identify positive incentives that would motivate both government personnel and contractors to incorporate pollution prevention into the early design phases of weapon system acquisitions. The adoption and implementation of such incentives would allow the Air Force to reach pollution prevention objectives more efficiently. A literature search revealed little information on the pollution prevention program in the military. In contrast much information was found concerning military cleanup activities. As a result, in-depth personal interviewing was used to measure pollution prevention awareness in Aeronautical Systems Center program offices. Interviews, analysis, and comparisons were made between three groups …
Repair Process Improvement At The Ogden Air Logistics Center, Landing Gear Division: A Case Study In The Application Of The Theory Of Constraints, David A. Maddox, Susan L. Martz
Repair Process Improvement At The Ogden Air Logistics Center, Landing Gear Division: A Case Study In The Application Of The Theory Of Constraints, David A. Maddox, Susan L. Martz
Theses and Dissertations
This study explored the nature and extent of success that resulted from the implementation of the Theory of Constraints (TOC) in a depot repair environment. The actions taken to implement TOC were determined. Performance measures which defined success were identified and data were collected and summarized to demonstrate performance before and after implementation of TOC concepts. Improvements in flowdays and work-in-process (WIP) were determined to be attributable to the TOC effort. In addition, the unique characteristics of probabalistic repair and supply system variability were noted as those characteristics that posed the greatest challenges to implementing TOC in a remanufacturing environment. …
A Comparison Of The Disaster™ Scheduling Software With A Simultaneous Scheduling Algorithm For Minimizing Maximum Tardiness In Job Shops, Barak J. Carlson, Christopher A. Lettiere
A Comparison Of The Disaster™ Scheduling Software With A Simultaneous Scheduling Algorithm For Minimizing Maximum Tardiness In Job Shops, Barak J. Carlson, Christopher A. Lettiere
Theses and Dissertations
The Theory of Constraints (TOC) is the foundation for a computerized scheduling system called DISASTER. Although this system has proven successful in many manufacturing settings, it has potential limitations due to the sequential heuristic process by which it schedules constraints. The objective of this thesis was to determine the extent to which these limitations impact the due date performance of schedules created by DISASTER. This objective was addressed by developing an algorithm to simultaneously schedule multiple constraints in a job shop environment and provide the optimal schedule for minimized maximum tardiness. This algorithm was used to obtain solutions for a …
An Investigation Of Integrated Product Development Implementation Issues: A Case Study Of Bosma Machine And Tool Corp, F. Paul Khuri, Howard M. Plevyak Jr.
An Investigation Of Integrated Product Development Implementation Issues: A Case Study Of Bosma Machine And Tool Corp, F. Paul Khuri, Howard M. Plevyak Jr.
Theses and Dissertations
This thesis investigated Integrated Product Development (IPD) implementation issues. Research emphasis focused on teams used in IPD, particularly self-directed work teams (SDWTs). The areas addressed in the study were: Work Environment, Team Organization, Training and Education, Group Dynamics and Communication, Motivation, Rewards and Incentives, Measurements, and Contracts. Data was collected using interviews and presented as a case study. The most significant findings on work environment were that the organization's leadership should commit to the teaming idea and sell it to the organization's members. Teams should be organized by choosing members carefully and defining all roles. Personnel should be trained in …
Scheduling A Medium-Sized Manufacturing Shop: A Simulation Study, Daniel J. Mcfeely
Scheduling A Medium-Sized Manufacturing Shop: A Simulation Study, Daniel J. Mcfeely
Theses and Dissertations
This study examined the application of simple-to-use, low cost scheduling methods to the operating environment of a medium-sized manufacturing shop. Computer simulation was used to evaluate eighteen different scheduling algorithms, each the result of the combination of a loading and a sequencing rule; due date setting was not considered since due dates are exogenously set. The loading rules investigated were Minimum Machine Required, Lowest Average WIP, and Lowest Average Aggregate Priority Level. The sequencing rules investigated were Priority, EDD, FIS, SPT, Slack, and Slack Ratio. The scheduling algorithms were evaluated against performance measures of mean tardiness, mean flowtime, mean percentage …