ESTIMATION OF THE REPAIR COST FOR AN OPEN TYPE FREEZER WITH LINEAR REGRESSION ANALYSIS

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Published: Jan 4, 2021
Keywords:
freezer estimation repair cost Multiple regression model

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Paitoon Siri-O-Ran
Department of Industrial Engineering Faculty of Engineering and Technology Punyapiwat Institute of Management
Ananya Innturn
Department of Industrial Engineering Faculty of Engineering and Technology Punyapiwat Institute of Management

Abstract

The objective of this research is to find the suitable model for estimation of the repair cost for an open type freezer in a convenience store. The problem encountered is an open type freezer has been repaired and reused a lot with relatively high repair cost and some devices may not be suitable to be repaired and recycled. The primary factor affecting the price of a freezer repair is the price of      a freezer lifetime and number of times that had been repaired.  Multiple linear regression analysis was used to find a repair evaluation model. The study indicated that the suitable model for estimation of the repair cost for an open type freezer consists of           2 independent variables, namely the number of times that has been repaired and lifetime. The approximate regression equation to estimation of the repair cost for an open type freezer = 1,425 * the number of times that the repair was done +1,285.2 * lifetime.          The adjusted coefficient of determination (R2Adjusted) is 0.83. This means that 83% of the variations in the repair cost of an open type freezer are explained by number of times that has been repaired and lifetime. The evaluation model of the repair cost for an open type freezer can be helped the company to make easier decisions.

Article Details

Issue
Vol. 31 No. 4 (2020): October-December
Section
Research Articles

The published articles are copyright of the Engineering Journal of Research and Development, The Engineering Institute of Thailand Under H.M. The King's Patronage (EIT).

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