Modeling and Analysis of Resource Sharing Approach in Common Platform Strategy Using Petri Net Theory

The most competitive advantages in business and manufacturing is resource-sharing.We must share common resources to produce a group of product family with using common platform strategy. This strategy helps us to increase profit and value in business. It is necessary to apply this strategy to model and analyze resource achievability in different situations. In this paper we try to develop a practical model for analyzing common resource behavioral in platform area with using Petri net theory. Petri Nets have been successfully used for modeling and control the dynamics of flexible manufacturing systems.This paper presents some important concepts about common platform and petri net theory and then presents numerical examples to show how to use Petri net for modeling and analysis in common platform. This model is very useful for common platform strategy and can be used to determine reliability of common platform systems in an effective way

Modeling and Analysis of Effective Ways for Improving the Reliability of Second-hand Products Sold with Warranty

Often, customers are uncertain about the performance and durability of the used/second-hand products. The warranties play an important role in reassuring the buyer. Offering the warranty implies that the dealer incurs additional costs to service any claims made by the customers. Reducing warranty costs is an issue of great interest to dealers. One way of improving the reliability and reducing the warranty servicing cost for second-hand items is through actions such as overhaul and upgrade which are carried out by the dealer or a third party. Improving actions allow the dealer to offer better warranty terms and to sell the item at a higher price. This paper deals with two effective approaches (virtual age approach and screening test approach) to decide on the reliability improvement strategies for second-hand products sold under various warranty policies (failure-free, rebate warranty, and a combination of free replacement and lump sum). A numerical example illustrates that from a dealer’s point of view, it is beneficial to carry out an improvement action only if the reduction in the warranty servicing cost is greater than the extra cost incurred due to this improvement action

Determination of the price for free repair warranty policy for a second-hand product with considering the buyer’s risk attitude

A warranty for a second-hand product is a contractual obligation offered by the dealer in connection with the sale of the product. Determination of warranty cost for second-hand products is extremely complex due to uncertainties with age, usage and past maintenance history. Pricing for warranty cover linked to sale of second-hand products is not only dependant on the failure characteristics and warranty policy but also the amount the buyer is willing to pay depending on buyer’s risk attitude. A dealer is expected to maximize profit which depends on volume of sale, price and expected cost to service warranty claims based on warranty policy. In this paper, a free repair warranty is considered with sale, under which the customer can have the product repaired free of charge if it fails during the warranty period. It is assumed that’s buyers of the used items are heterogeneous with a random risk-aversion parameter in their risk attitudes towards a warranty price and uncertain repair costs. This paper proposes mathematical model on warranty cost to build into price for the sale of second-hand product based on a utility model which maximizes the dealer’s expected profit

A Mathematical Model for Integrating Cell Formation Problem with Machine Layout

This paper deals with the cellular manufacturing system (CMS) that is based on group technology concepts. CMS is defined as identifying the similar parts that are processed on the same machines and then grouping them as a cell. The most proposed models for solving CMS are focused on cell formation problem while machine layout is considered in few papers. This paper addresses a mathematical model for the joint problem of the cell formation problem and the machine layout. The objective is to minimize the total cost of inter-cell and intra-cell (forward and backward) movements and the investment cost of machines. This model has also considered the minimum utilization level of each cell to achieve the higher performance of cell utilization. Two examples from the literature are solved by the LINGO Software to validate and verify the proposed model

Determination of the price for free repair warranty policy for a second-hand product with considering the buyer’s risk attitude

A warranty for a second-hand product is a contractual obligation offered by the dealer in connection with the sale of the product. Determination of warranty cost for second-hand products is extremely complex due to uncertainties with age, usage and past maintenance history. Pricing for warranty cover linked to sale of second-hand products is not only dependant on the failure characteristics and warranty policy but also the amount the buyer is willing to pay depending on buyer’s risk attitude. A dealer is expected to maximize profit which depends on volume of sale, price and expected cost to service warranty claims based on warranty policy. In this paper, a free repair warranty is considered with sale, under which the customer can have the product repaired free of charge if it fails during the warranty period. It is assumed that’s buyers of the used items are heterogeneous with a random risk-aversion parameter in their risk attitudes towards a warranty price and uncertain repair costs. This paper proposes mathematical model on warranty cost to build into price for the sale of second-hand product based on a utility model which maximizes the dealer’s expected profit

Estimating efficient value of controllable variable using an adaptive neural network algorithm: Case of a railway system

45-50This study proposes a method, using adaptive neural network (ANN), to predict, estimate and evaluate performancevariables without requiring any restrictive assumptions, taking case of a railway system. Also, by means of this method, it wouldbe possible to compare actual performance data with estimated values and route their assignable causes in future periods. Energyconsumption norm of vehicles in case of energy railway and real data of energy consumption in Iranian railway is considered