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Full-Text Articles in Engineering
Exploring The Impact Of Reality On Mrp Performance, Surendra M. Gupta
Exploring The Impact Of Reality On Mrp Performance, Surendra M. Gupta
Surendra M. Gupta
This paper deals with the sensitivity analysis of MRP under probablistic lead times and demands. A simulation model incorporating a MRP module is described and results obtained from multi-level product structures explored. A total of eight lot sizing rules are considered. The results produced by the simulation model deal with period by period and overall simulation run statistics. These statistics cover service level, average backorder and inventory levels, maximum and minimum backorder and inventory levels, and the number of periods backorders were experienced during the simulation run. Several studies conducted using this simulation model are described.
Analysis Of A Just-In-Time Production System With Supplier Kanbans, Surendra Gupta, Kenichi Nakashima
Analysis Of A Just-In-Time Production System With Supplier Kanbans, Surendra Gupta, Kenichi Nakashima
Surendra M. Gupta
In this paper, we introduce a generalized stochastic Petri net (GSPN) to model a single-process, single-product, Just- In-Time (JIT) manufacturing facility with a supplier kanban system for multiple vendors. Its properties are investigated and the effects of the vendors' activities on the system are discussed using ANOVA.
Evaluation Of The Influence Of Combined Supply/Demand Uncertainties In Materials Management, Surendra M. Gupta, Louis Brennan
Evaluation Of The Influence Of Combined Supply/Demand Uncertainties In Materials Management, Surendra M. Gupta, Louis Brennan
Surendra M. Gupta
Material requirements planning (MRP) systems continue to serve as the focus of materials of most companies management process. Computer simulation is a tool that is widely used to analyze the performance of such systems. This paper considers the impact of the presence of both supply and demand uncertainties on the performance of MRP systems. The work reported here is based on a simulation study involving a variety of supply and demand conditions. The study establishes the significance of product structure shape and variant, lot sizing rule, cost ratio and the uncertainty factors.
Dynamic Group Maintenance Policy In A Smart Sensor Integrated Flow-Line Manufacturing System, Surendra M. Gupta, Srikanth Vadde, Sagar V. Kamarthi, Cheng Cui
Dynamic Group Maintenance Policy In A Smart Sensor Integrated Flow-Line Manufacturing System, Surendra M. Gupta, Srikanth Vadde, Sagar V. Kamarthi, Cheng Cui
Surendra M. Gupta
Machine-tool breakdowns, both expected and unexpected, make it difficult to devise effective maintenance plans that do not adversely affect the performance of a manufacturing system. This work presents a heuristic maintenance grouping algorithm which takes the machine-tool failure information provided by smart sensors into account to come up with condition-based preventive maintenance plans that does not severely affect the manufacturing system operations. Studies on the simulation model of a flow-line manufacturing system integrated with smart sensors indicate that grouping of maintenance actions increases the uptime efficiency, boosts the production rate, reduces the maintenance cost, and decreases the production loss.
Design And Analysis Of A Complex Computerized Manufacturing Facility Using Slam, Surendra M. Gupta
Design And Analysis Of A Complex Computerized Manufacturing Facility Using Slam, Surendra M. Gupta
Surendra M. Gupta
This paper presents a generalized model for a computerized manufacturing facility consisting of a complex conveyor loop workstation interface with a multi-aisle mini load system using SLAM (Simulation Language for Alternative Modeling).
A Comparison Of Continuous Versus Periodic Review Of Order Levels To Control A Make-To-Order Production System, Surendra M. Gupta, Fikri Karesmen
A Comparison Of Continuous Versus Periodic Review Of Order Levels To Control A Make-To-Order Production System, Surendra M. Gupta, Fikri Karesmen
Surendra M. Gupta
We consider a single stage, make-to-order job shop with unit demands, unit production and a finite capacity. The production can be switched on or off depending on the level of orders waiting to be processed. Under a threshold type operating policy, optimal production switchover levels, that minimize a cost function including holding, operating, and switching costs are found.
Uncertainty And Back-Ordering In Multi-Level Product Structures, Surendra Gupta, Louis Brennan
Uncertainty And Back-Ordering In Multi-Level Product Structures, Surendra Gupta, Louis Brennan
Surendra M. Gupta
The influence of uncertainty on the performance of Material Requirements Planning (MRP) systems has been the focus of several studies. All of these studies have incorporated non back-order lot sizing rules. However, attention has been recently directed to back-order lot sizing rules. This paper considers the impact of the presence of both supply and demand uncertainties on the performance of MRP systems in an environment where back-orders are planned. The word reported here is based on a simulation study involving a variety of supply and demand conditions. The study establishes the significance of product structure shape and variant, lot sizing …