scholarly journals Joint optimization of economic production quantity and preventive maintenance with considering multi-products and reserve time

2017 ◽  
Vol 10 (3) ◽  
pp. 431
Author(s):  
Xuejuan Liu ◽  
Binrong Wang
Keyword(s):  
Production Planning ◽  
Preventive Maintenance ◽  
Optimal Number ◽  
Production Cycle ◽  
Maintenance Schedule ◽  
Multiple Products ◽  
Economic Production Quantity ◽  
Economic Production ◽  
Production Quantity ◽  
Reserve Time

Purpose: We deal with the problem of the joint determination of optimal economic production quantity (EPQ) and optimal preventive maintenance (PM) for a system that can produce multiple products alternately. The objective is to find the optimal number of production cycles and the PM policy simultaneously by minimizing the cost model.Design/methodology/approach: Considering the products go through the system in a sequence and a complete run of all products forms a production cycle. In each cycle, beyond production time we also consider some reserve time for maintenance and setup, shortage and overproduction may occur. We study the integrated problem based on two PM policies, and explain the situation with the other PM policies. The delay – time concept is used to model PM decisions.Findings: Using the integrated EPQ and PM model, we can calculate the optimal production planning and PM schedule simultaneously, especially we consider multiple products in each production cycle, which is more practical and economic than previous works.Originality/value: In modern companies, the production planning and maintenance schedule share the same system, and traditional research about two activities is separated, that always generate conflicts, such as inadequate or excessive maintenance, and shortages, etc., so we develop the integrated EPQ and PM model to avoid these undesirable effects.

Consumer Electronics Enterprise Patent Strategy Based on University-Enterprise Cooperation with a Failure Rate

2014 ◽  
Vol 556-562 ◽  
pp. 6616-6619
Author(s):  
Jun Chen ◽  
Lai Fu Ye
Keyword(s):  
Research And Development ◽  
Failure Rate ◽  
Optimal Number ◽  
Consumer Electronics ◽  
Economic Production Quantity ◽  
Patent Strategy ◽  
Economic Production ◽  
Epq Model ◽  
Production Quantity ◽  
Development Failure

Based on Economic Production Quantity (EPQ) model with certain defective rate, this paper analyses technology patent storage problems in university-enterprise cooperation under the perspective of consumer electronics enterprise, finds out the optimal number and cycle of patent research considering the factor of research and development failure rate.

scholarly journals Heuristics for the Economic Production Quantity Problem under Restrictions on Production and Maintenance Time

2016 ◽  
Vol 2016 ◽  
pp. 1-9
Author(s):  
Qi Xu ◽  
Jianteng Xu
Keyword(s):  
Preventive Maintenance ◽  
Heuristic Algorithms ◽  
Efficient Production ◽  
Maintenance Policy ◽  
Economic Production Quantity ◽  
Economic Production ◽  
Production Run ◽  
Maintenance Time ◽  
Production Quantity ◽  
Run Time

This paper proposes an economic production quantity problem with the maximal production run time and minimal preventive maintenance time over a finite planning horizon. The objective is to find the efficient production and maintenance policy to minimize the total cost composed of production, maintenance, shortages, and holding costs under the restriction on the production run time and the preventive maintenance time. The production and maintenance decisions include the production and maintenance frequencies and the production run and the maintenance time. The variability and the boundedness of the production run and maintenance time make the problem difficult to solve. Two heuristic algorithms are developed using different techniques based on the optimal properties of the relaxed problem. The performance comparison between the two algorithms is illustrated by numerical examples. The numerical results show that, for the most part, there exists a heuristic algorithm which is more effective than the other.

Patent Storage Research of Cooperation between S&T-Oriented Small-Micro Enterprise and University in Triple Helix Innovation Based on EPQ Model

2013 ◽  
Vol 411-414 ◽  
pp. 2317-2321 ◽  
Author(s):  
Lai Fu Ye ◽  
Shi Bin Su
Keyword(s):  
Triple Helix ◽  
Research Direction ◽  
Optimal Number ◽  
Future Research ◽  
Economic Production Quantity ◽  
Economic Production ◽  
Epq Model ◽  
Production Quantity ◽  
The Government ◽  
And Storage

Based on the government-sponsored economic production quantity(EPQ)model, this paper analyses technology patent storage problems in university-enterprise cooperation under the perspective of S&T-oriented small-micro enterprise, finds out the optimal number and cycle of patent research which can keep S&T-oriented small-micro enterprise the lowest cost of research and storage, then puts forward the future research direction.

scholarly journals Pengembangan Model Economic Production Quantity Mengakomodasi Continue dan Discrete Demand serta Kebijakan Rework Secara Simultan

2020 ◽  
Vol 1 (1) ◽  
pp. 8
Author(s):  
Nurike Oktavia ◽  
Henmaidi Henmaidi ◽  
Prima Fithri
Keyword(s):  
Geometric Mean ◽  
Mathematical Formulation ◽  
Production Costs ◽  
Production Cycle ◽  
Total Production ◽  
Inventory Costs ◽  
Economic Production Quantity ◽  
Economic Production ◽  
Epq Model ◽  
Production Quantity

Inventory of finished goods needs to be planned and controlled regularly. Fulfilling customer demand whenever and wherever is the main purpose of the supply. This issue is related to production activities. Many companies use the Economic Production Quantity (EPQ) Model in determining the size of their lot productions. This model is able to show how to minimize total production costs by reducing inventory costs. Customer behavior at PT XYZ makes product delivery divided into 2 types. The first type, finished goods is sent continuously in small amounts called continue demand. The second type, products is sent between certain time intervals in large quantities called discrete demand. Basic EPQ Model’s parameters do not accommodate a system like this. In addition, PT XYZ requires rework for products that do not pass the quality test. Therefore, this research was developed to formulate EPQ model that can accommodate two types of demand, continue and discrete, as well as the existence of rework policy. This study tries to provide another approach in solving the derivation problem using the "Arithmetic-Geometric Mean" method. The results of this study will display a mathematical formulation to find the optimal production cycle time for PT XYZ. Numerical examples are discussed to show practical models.

scholarly journals Replenishment policy for an economic production quantity model considering rework and multiple shipments

2020 ◽  
Vol 9 (3) ◽  
pp. 758
Author(s):  
Usman Ghani ◽  
Mubashir Hayat
Keyword(s):  
Cost Function ◽  
Real Life ◽  
Optimal Number ◽  
Lot Size ◽  
Defective Items ◽  
Economic Production Quantity ◽  
Economic Production ◽  
Long Run ◽  
Epq Model ◽  
Production Quantity

Determining the optimal replenishment lot size and shipment policy for a production setup has been of greater interest during the last few years. This paper derives the optimal replenishment lot size and shipment policy for an Economic Production Quantity (EPQ) model with rework of defective items. However, in a real life situation, multi-shipment policy is used in lieu of continuous issuing policy and generation of defective items is inevitable. The proposed research assume that all imperfect quality items are reworked to perfect quality items and then all perfect quality items are delivered to the customers. Mathematical modeling is used in this study and the long-run average production–inventory-delivery cost function is derived. Convexity of the cost function is proved by using the Hessian matrix equations. The closed-form optimal replenishment lot size and optimal number of shipments that minimize the long-run average costs for such an EPQ model are derived.  

Sign in / Sign up

Export Citation Format

Share Document