A Comparison of Inventory Control Policies for a Joint Manufacturing / Remanufacturing Environment with Remanufacturing Yield Loss

2004-08-24
Bayındır, Zeynep Pelin
Dekker, Rommert
We consider a joint manufacturing / remanufacturing environment with remanufacturing yield loss. Demand and return follow independent stationary Poisson processes. Returns can be disposed off upon arrival to the system. Manufacturing and remanufacturing operations performed in the same facility at exponential rates. Yield information becomes available after remanufacturing. Demands that are not directly satisfied are lost. We investigate what inventories to consider when making production and disposal decisions, with the objective of maximizing the long-run average expected profit. Four different policies are compared that base disposal decisions on either the local (returns) inventory or the global inventory, and production decisions on either the local (serviceable) inventory or the global inventory. By modelling the system as a Markov process, expressions for the profit associated with each policy are derived. An extensive numerical study shows that it is always optimal to base disposal decisions on the local inventory and production decisions on the global inventory within the parameter sets considered. A sensitivity analysis reveals further insights.

Suggestions

Analyzing the Effects of Inventory Cost Setting Rules in a Disassembly and Recovery Environment
Akcali, Elif; Bayındır, Zeynep Pelin (null; 2005-10-15)
We consider a salvaging facility that satisfies the demand for remanufactured parts that can be recovered from the end-of-life products. One of the difficulties faced in planning for such a system is the determination of the opportunity cost associated with carrying recovered parts inventory. In this study we investigate the effect of different rules to determine this opportunity cost on the performance of the system. The performance of several different rules is assessed by a computational study under a pr...
Experimental determination of tool wear in routing and trimming of CFRP composites
Peker, Zühal; Akkök, Metin; Kılıç, S. Engin; Department of Mechanical Engineering (2015)
In order to fulfill growing demand for lighter aircraft, Carbon fiber reinforced polymers (CFRP) have been developed, which differ from metals with regards to their machinability characteristics. The main problem in machining process is the damage caused by delamination of CFRP materials which need to be both cut and shorn of fibers at the same time, since they are remarkably abrasive in nature. This research aims at accessing the most appropriate cutting condition with less tool wear in routing and trimmin...
Assessment of different finite element modeling techniques on delamination growth in advanced composite structures
Uçak, İbrahim; Parnas, Kemal Levend; Department of Mechanical Engineering (2012)
Virtual crack closure technique (VCCT) is commonly used to analyze debonding/delamination onset and growth in fiber reinforced composite assemblies. VCCT is a computational fracture mechanics based approach, and is based on Irwin’s crack closure integral. In this study, the debonding/delamination onset and growth potential in a bonded fiber reinforced composite skin-flange assembly is investigated using the VCCT. A parametric finite element analyses is conducted. The finite element analyses results are comp...
Using cost of software quality for a process improvement initiative
Demirörs, Onur; Yildiz, O; Guceglioglu, AS (2000-09-07)
Process improvement in manufacturing sector traditionally starts with calculation of Cost of Quality. Cost of Quality calculation enables identification of the weakest links of the process that requires immediate attention, prioritization of improvement tasks and establishment of a baseline for these tasks. In the software field, process improvement initiatives usually, leave out the cost of quality calculations. In this paper, we report a case study on the utilization of Cost of Software Quality as an init...
Tactical inventory and backorder decisions for systems with predictable production yield
MART, Turgut; Duran, Serhan; Bakal, İsmail Serdar (2013-06-01)
We consider a manufacturing system with stochastic demand and predictable production yield. The manufacturer has predetermined prices and limited production capacity in each period. The manufacturer also has the option to save some inventory for future periods even if there is demand in the current period. The demand that is not met is lost or may be backordered for only one period. Our objective is to maximize the expected profit by choosing optimal produce-up-to level ((Y) over bar*(t)), save (S*(t)) and ...
Citation Formats
Z. P. Bayındır and R. Dekker, “A Comparison of Inventory Control Policies for a Joint Manufacturing / Remanufacturing Environment with Remanufacturing Yield Loss,” presented at the 13th International Symposium on Inventories, 22 - 27 Ağustos 2004, Budapest, Macaristan, 2004, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/86192.