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\def\makelabel##1{\upshape ##1}}% } {\end{list}\end{raggedright}} \newenvironment{specHead}[2]% {\vspace{20pt}\hrule\vspace{10pt}% \phantomsection\label{#1}\markright{#2}% \pdfbookmark[2]{#2}{#1}% \hspace{-0.75in}{\bfseries\fontsize{16pt}{18pt}\selectfont#2}% }{} \def\TheFullDate{2015-03-15 (revised: 15 March 2015)} \def\TheID{\makeatother } \def\TheDate{2015-03-15} \title{Using Fuzzy Goal Programming Technique to Obtain the Optimum Production of Vehicle Spare Parts, A Case Study} \author{}\makeatletter \makeatletter \newcommand*{\cleartoleftpage}{% \clearpage \if@twoside \ifodd\c@page \hbox{}\newpage \if@twocolumn \hbox{}\newpage \fi \fi \fi } \makeatother \makeatletter \thispagestyle{empty} \markright{\@title}\markboth{\@title}{\@author} \renewcommand\small{\@setfontsize\small{9pt}{11pt}\abovedisplayskip 8.5\p@ plus3\p@ minus4\p@ \belowdisplayskip \abovedisplayskip \abovedisplayshortskip \z@ plus2\p@ \belowdisplayshortskip 4\p@ plus2\p@ minus2\p@ \def\@listi{\leftmargin\leftmargini \topsep 2\p@ plus1\p@ minus1\p@ \parsep 2\p@ plus\p@ minus\p@ \itemsep 1pt} } \makeatother \fvset{frame=single,numberblanklines=false,xleftmargin=5mm,xrightmargin=5mm} \fancyhf{} \setlength{\headheight}{14pt} \fancyhead[LE]{\bfseries\leftmark} \fancyhead[RO]{\bfseries\rightmark} \fancyfoot[RO]{} \fancyfoot[CO]{\thepage} \fancyfoot[LO]{\TheID} \fancyfoot[LE]{} \fancyfoot[CE]{\thepage} \fancyfoot[RE]{\TheID} \hypersetup{citebordercolor=0.75 0.75 0.75,linkbordercolor=0.75 0.75 0.75,urlbordercolor=0.75 0.75 0.75,bookmarksnumbered=true} \fancypagestyle{plain}{\fancyhead{}\renewcommand{\headrulewidth}{0pt}} \date{} \usepackage{authblk} \providecommand{\keywords}[1] { \footnotesize \textbf{\textit{Index terms---}} #1 } \usepackage{graphicx,xcolor} \definecolor{GJBlue}{HTML}{273B81} \definecolor{GJLightBlue}{HTML}{0A9DD9} \definecolor{GJMediumGrey}{HTML}{6D6E70} \definecolor{GJLightGrey}{HTML}{929497} \renewenvironment{abstract}{% \setlength{\parindent}{0pt}\raggedright \textcolor{GJMediumGrey}{\rule{\textwidth}{2pt}} \vskip16pt \textcolor{GJBlue}{\large\bfseries\abstractname\space} }{% \vskip8pt \textcolor{GJMediumGrey}{\rule{\textwidth}{2pt}} \vskip16pt } \usepackage[absolute,overlay]{textpos} \makeatother \usepackage{lineno} \linenumbers \begin{document} \author[1]{Jasem Alrajhi} \author[2]{Hilal A. Abdelwali} \author[3]{Elsayed E.M. Ellaimony} \author[4]{Yousef M. Alhouli} \author[5]{Ahmed E. Murad} \affil[1]{ College of Technological Studies, PAAET, Kuwait} \renewcommand\Authands{ and } \date{\small \em Received: 3 February 2015 Accepted: 5 March 2015 Published: 15 March 2015} \maketitle \begin{abstract} This paper studies the vehicle spare parts production problem to obtain the optimum production rate under fuzzy capital budget. We applied the integer goal programming technique to determine the best compromise solution. There are two goals in our case study. These goals are minimization of the uncertain capital budget and maximization of the uncertain expected profits. The case study is a factory which produces different types of vehicle heat exchangers. The results indicate that the problem solution depends on the membership function and the ?- cut. The optimum quantities of heat exchangers? production are found to be biased to the lower limit of production. \end{abstract} \keywords{} \begin{textblock*}{18cm}(1cm,1cm) % {block width} (coords) \textcolor{GJBlue}{\LARGE Global Journals \LaTeX\ JournalKaleidoscope\texttrademark} \end{textblock*} \begin{textblock*}{18cm}(1.4cm,1.5cm) % {block width} (coords) \textcolor{GJBlue}{\footnotesize \\ Artificial Intelligence formulated this projection for compatibility purposes from the original article published at Global Journals. However, this technology is currently in beta. \emph{Therefore, kindly ignore odd layouts, missed formulae, text, tables, or figures.}} \end{textblock*} \let\tabcellsep& \section[{Introduction}]{Introduction}\par ue to huge changes in vehicle prices, fuels, oils, and spare parts' prices, it is important for transportation companies to study their fleet of vehicles from the opinion of vehicle operations economics. The vehicle operations economics field studies the maximization of profit and/or minimization of costs. One of the topics that is needed to be studied and applied to the real world applications is finding the optimum production rate of vehicle spare parts.\par The capital budgeting in automobile firms is introduced by AbouelNour \hyperref[b0]{[1]}. The optimal distribution of a certain amount of capital budgeting in production of vehicle spare parts had been obtained using integer programming technique in formulation and solution. Mohan A. et al \hyperref[b1]{[2]} developed a decision support system for budget allocation of an R\&D organization.\par Multiple criteria decision making (MCDM) refers to making decisions in the presence of multiple, usually, conflicting objectives. These problems can be solved either directly \hyperref[b9]{[10]} or using different secularization forms (SOP) \hyperref[b10]{[11]}. Most investigators in the general area of multiobjective mathematical programming agree that goal programming technique represents the work horse of multiobjective mathematical programming. Lee S.M. et al \hyperref[b2]{[3]} introduced capital budgeting for multiple objectives. Zamfirescu, L. et al \hyperref[b3]{[4]} prepared a goal programming as a decision model for performancebased budgeting.\par Goal programming is found to be useful in real life situations, for many problems it may not be possible to satisfy certain specified goals within given constraints. Then problem then becomes one of maximizing the degree of attainment of these goals. Using goal programming for marketing decisions with a case study is illustrated by Lee, S. et al \hyperref[b4]{[5]}. Lee, S. \hyperref[b5]{[6]} introduced goal programming for decision analysis. Dauer, J.P. et al \hyperref[b6]{[7]} introduce a finite iteration algorithm for solving general goal programming problems. The approach enables one to solve linear, no linear, integer and other goal programming problems using the corresponding optimization technique in an iterative manner.\par In the real life systems, the uncertainties and vagueness accomplishing the determination of cost of production, the expected selling price and upper and lower pounds of the production of the spare parts make the problem fuzzy or stochastic rather than deterministic one.\par Hu, C.F. et al \hyperref[b7]{[8]} introduced a fuzzy goal programming approach to multi-objective optimization problem with priorities. Khalili, K. et al \hyperref[b8]{[9]} presented a paper about solving multi-period project selection problems with fuzzy goal programming beased on TOPSIS and fuzzy preference relation. Eid, M.H. \hyperref[b11]{[12]} gives methods of solving integer multi criteria decision making problems with fuzzy parameters.\par This paper introduces the analysis of the optimum vehicle spare parts production, where the problem of distribution of fuzzy capital budget is applied.\par The technique is introduced in Sakawa [13] for transforming fuzzy problems to non-fuzzy form is combined with the interactive approach to goal programming \hyperref[b11]{[12]} to develop the method of solution of such problem, where the method is through two goals is used. The first goal is the fuzzy capital budgeting minimization, while the second one is fuzzy profit maximization.\par Our study is applied on a company which produces different types of vehicles' heat exchangers. The aim of this study is to obtain the optimum number of heat exchangers which maximizes profits and minimizes the production cost under fuzzy budget. \section[{II.}]{II.} \section[{Concept of Goal Programming a) General}]{Concept of Goal Programming a) General}\par Goal programming is a modification and extension of linear programming technique. The goal programming approach allows a simultaneous solution of a system of complex objectives rather than a single objective. In other words, goal programming is a technique that is capable of handling decision problems that deal with a single goal and multiple sub-goals, as well as problems with multiple goals and multiple subgoals. In addition, the objective function of a goal programming model may be composed of non-homogeneous units of measure, such as pounds and dollars, rather than one type of units. Often, multiple goals of management are in conflict or are achievable only at the expense of other goals. Furthermore, these goals are incommensurable. Thus, the solution of the problem requires an establishment of a hierarchy of importance among these incompatible goals so that the low-order goals are considered only after the higherorder goals are satisfied or have reached the point beyond which no further improvements are desired. In goal programming, instead of trying to maximize or minimize the objective criterion directly as in linear programming, deviations between goals and what can be achieved within the given set of constraints are to be minimized \hyperref[b5]{[6]}. \section[{b) Formulation of the Goal Programming Proble}]{b) Formulation of the Goal Programming Proble}??????. ?? 1 ??? 1 (?? 1 , ?? 1 + , ?? 1 ? )? + ?? 2 ??? 2 (?? 2 , ?? 2 + , ?? 2 ? )? + ? + ?? ?? ??? ?? (?? ?? , ?? ?? + , ?? ?? ? )?\par Subject to: is the set representing the system constraints.?? ?? (??) + ?? ?? ? ? ?? ?? + = ?? ?? , ?? = 1, 2, ? , ?? , ?? ? ?? , ??, ?? ?? + , ?? ?? ? ? 0, ?? = 1, \section[{c) Methods of Solving Goal Programming Problems}]{c) Methods of Solving Goal Programming Problems}\par There are more than one method for solving goal programming problems. From these methods, the most common are:\par 1. The graphical method of goal programming.\par 2. The simplex method of goal programming.\par 3. The interactive approach of goal programming. These methods are illustrated in \hyperref[b5]{[6,}\hyperref[b6]{7]}.\par In this work the interactive approach of goal programming was used. \section[{III.}]{III.} \section[{Vehicle Spare Parts Production Formulation}]{Vehicle Spare Parts Production Formulation}\par The mathematical model of vehicle spare parts production in fuzzy environment which minimizes the total fuzzy capital budgeting and maximizes the total expected fuzzy profit is formulated as an integer goal programming problem with fuzzy parameters. There are two goals here, fuzzy capital budgeting goal and fuzzy profit goal. Also, there are a set of constraints represent upper and lower bounds of the quantities which should be produced from the different types of spare parts. \section[{Let:}]{Let:}\par x i : is the quantity of production from spare parts i, i= 1, 2, ?, n. c i : is the production cost of the spare part I, i= 1, 2, ?, n.\par ?? ?? + ?? ?? \textasciitilde ?? ? i : is fuzzy upper bound of the production of spare parts i, i= 1, 2, ?, n. p 1 >>> p 2 : is the priority structure. ?? 1 ? , ?? 2 ? : are the under achievements of the deviational variables.\par ?? 1 + , ?? 2 + : are the upper achievements of the deviational variables.\par Then the problem takes the following form:??????. ?? = ?? 1 ?? 1 + + ?? 2 ?? 2 ?\par Subject to:? ?? ?? ?? ?? + ?? 1 ? ? ?? 1 + = ?? + ?? ?1?? ? ?? ??=1 ? ?? ?? ?? ?? + ?? 2 ? ? ?? 2 + = ?? + ?? ?2?? ? ?? ??=1 ?? ?? + ?? ? ?? ?? ? ?? ? ?? ?? ? ?? ?? + ?? ? ?? ?? ? ?? , i= 1. 2, ?, n ?? ?? , ?? 1 ? , ?? 1 + , ?? 2 ? , ?? 2 + ? 0, ?? ?? ???????????????? , i= 1. 2, ?, n\par IV. Deterministic (crisp) form of the Problem\par The mathematical formulation of spare parts production in fuzzy environment problem can be transformed to the following non-fuzzy form (? -fuzzy integer goal programming problem):??????. ?? = ?? 1 ?? 1 + + ?? 2 ?? 2 ?\par Subject to:? ?? ?? ?? ?? + ?? 1 ? ? ?? 1 + = ?? + ?? 1 ?? ? ?? ??=1 ? ?? ?? ?? ?? + ?? 2 ? ? ?? 2 + = ?? + ?? 2 ?? ? ?? ??=1 ?? 1 ? ?? 1 ? ?? 1 ?? 2 ? ?? 2 ? ?? 2 ?? ?? + ?? ?? ?? ? ?? ? ?? ?? ? ?? ?? + ?? ?? ?? ? ?? , i= 1. 2, ?, n ?? ?? ? ?? ?? ? ?? ?? , i= 1. 2, ?, n ?? ?? ? ?? ?? ? ?? ?? , i= 1. 2, ?, n ?? ?? , ?? 1 ? , ?? 1 + , ?? 2 ? , ?? 2 + , ?? 1 , ?? 2 , ?? ?? , ?? ?? ? 0, ?? ?? ???????????????? , i= 1. 2, ?, n V. \section[{Vehicle Spare Parts Production Application a) Data Collection}]{Vehicle Spare Parts Production Application a) Data Collection}\par The application was carried out in a vehicle heat exchangers production factory which produce different different types of heat exchangers used for different types of vehicles which operates with diesel engines.\par Table \hyperref[b0]{(1)} illustrates the variable name, company part number, minimum limit, maximum limit of production, production cost and selling price. Where: x 1 : is the number of heat exchangers for 3.5t transporter. x 2 : is the number of heat exchangers for 2.8t transporter. x 3 : is the number of heat exchangers for 2t transporter. x 4 : is the number of heat exchangers for 2.5t transporter. x 5 : is the number of heat exchangers for 5 cylinder microbus. x 6 : is the number of heat exchangers for 4 cylinder microbus. x 7 : is the number of heat exchangers for 5 cylinder microbus. x 8 : is the number of heat exchangers for 5 cylinder microbus. x 9 : is the number of heat exchangers for 6t transporter. x 10 : is the number of heat exchangers for 2.5t transporter.\par The fuzzy budget allocated to the production (?? + ?? ?1?? ?) = LE 4000000 + 100000 ?? ?1\par The fuzzy expected profit (b + ?? ?2?? ? ) = LE 200000 + 500000 ?? ?2 \section[{b) Mathematical Formulation of Applied Proble}]{b) Mathematical Formulation of Applied Proble}\par The applied problem takes the following form: ??????. ?? = ?? 1 ?? 1 ? + ?? 2 ??ð??"ð??" ??1 ??? ?1?, ?? ??2 ??? ?2?, ? ?? 1 (?? ? ?? ), ?? ??1 (?? ? ?? ) = ? ? ? ? ? ? ? ? ? 0 ? ? ? ?? ?? ? ?? ?? 1 ?? ?? ? ?? ?? 1 ?? ?? 2 ? ?? ?? 1 ?? ?? 1 ? ?? ?? ? ?? ?? 2 1 ?? ?? 2 ? ?? ?? ? ?? ?? 3 ?? ?? ? ?? ?? 3 ?? ?? 4 ? ?? ?? 3 ?? ?? 3 ? ?? ?? ? ?? ?? 4 0 ?? ?? 4 ? ?? ?? ? ?\par By taking the cut ? = 0.5, then table 2 illustrates values of S j , T j , Q j , R j , M j , N j . ? 250 ? 0 3.5 ? ?? 1 ? 0?? 1 ? 8.5 ? 0 1.5 ? ?? 2 ? 0?? 2 ? 3.5 ? 0 1.5 ? ?? 1 ? 0?? 1 ? 5 ? 0 2 ? ?? 2 ? 0?? 2 ? 5 ? 0 2 ? ?? 3 ? 0?? 3 ? 7 ? 0 1.5 ? ?? 4 ? 0?? 4 ? 4 ? 0 1.5 ? ?? 5 ? 0?? 5 ? 4 ? 0 1.5 ? ?? 6 ? 0?? 6 ? 5 ? 0 1.5 ? ?? 7 ? 0?? 7 ? 4 ? 0 3 ? ?? 8 ? 0?? 8 ? 7.5 ? 0 1.5 ? ?? 9 ? 0?? 9 ? 4 ? 0 1.5 ? ?? 10 ? 0?? 10 ? 6 ? 0 1.5 ? ?? 1 ? 0?? 1 ? 4 ? 0 4 ? ?? 2 ? 0?? 2 ? 8 ? 0 3 ? ?? 3 ? 0?? 3 ? 8 ? 0 4 ? ?? 4 ? 0?? 4 ? 8 ? 0 3 ? ?? 5 ? 0?? 5 ? 5 ? 0 3 ? ?? 6 ? 0?? 6 ? 6 ? 0 2 ? ?? 7 ? 0?? 7 ? 7.5 ? 0 3.5 ? ?? 8 ? 0?? 8 ? 6 ? 0 3 ? ?? 9 ? 0?? 9 ? 5 ? 0 1.5 ? ?? 10 ? 0 ?? 10 ? 4 ? 0 ?? ?? , ?? 1 ? , ?? 1 + , ?? 2 ? , ?? 2 + , ?? 1 , ?? 2 , ?? ?? , ?? ?? ? 0, ?? ?? ???????????????? , i= 1. 2, ?, n c) Application Results\par The problem is solved by a mixed integer linear programming package using the iterative approach of goal programming. The optimum solution which minimizes the allocated capital budget and maximizes the profit is given in Table \hyperref[b2]{(3)}. ? The minimum production cost is \$1544680.5 ? The maximum profit is \$666825.5 ? The optimum quantities of heat exchangers are biased to the lower limits of the production as a result of solution of the problem with the minimization of total capital budget goal with a higher priority than the maximization of the expected profit goal.\begin{figure}[htbp] \noindent\textbf{(} \par \begin{longtable}{P{0.07489754098360656\textwidth}P{0.2543032786885246\textwidth}P{0.12889344262295083\textwidth}P{0.20379098360655737\textwidth}P{0.0992827868852459\textwidth}P{0.08883196721311476\textwidth}} x 7\tabcellsep 630 501 01 01\tabcellsep 600\tabcellsep 2750\tabcellsep 80.3\tabcellsep 130\\ x 8\tabcellsep 655 501 86 01\tabcellsep 1000\tabcellsep 5500\tabcellsep 71.7\tabcellsep 150\\ x 9\tabcellsep 350 501 19 01\tabcellsep 600\tabcellsep 2100\tabcellsep 359\tabcellsep 400\\ x 10\tabcellsep 560 501 22 01\tabcellsep 40\tabcellsep 450\tabcellsep 149.5\tabcellsep 200\\ \tabcellsep \tabcellsep \tabcellsep \multicolumn{3}{l}{types of vehicle heat exchangers, for a group of ten}\\ \tabcellsep \tabcellsep \multicolumn{2}{l}{1) : Collected Data}\tabcellsep \tabcellsep \\ Variable\tabcellsep Company Part\tabcellsep Minimum Limit\tabcellsep Maximum\tabcellsep Production\tabcellsep Selling Price\\ Name\tabcellsep Number\tabcellsep of Production\tabcellsep Limit of\tabcellsep Cost (in \$)\tabcellsep (in \$)\\ \tabcellsep \tabcellsep \tabcellsep Production\tabcellsep \tabcellsep \\ x 1\tabcellsep 450 501 22 01\tabcellsep 30\tabcellsep 100\tabcellsep 277\tabcellsep 366\\ x 2\tabcellsep 450 501 70 01\tabcellsep 500\tabcellsep 12000\tabcellsep 175\tabcellsep 255\\ x 3\tabcellsep 450 501 24 01\tabcellsep 4600\tabcellsep 15000\tabcellsep 144\tabcellsep 203.2\\ x 4\tabcellsep 450 501 19 01\tabcellsep 600\tabcellsep 1500\tabcellsep 168\tabcellsep 240\\ x 5\tabcellsep 620 50591 04\tabcellsep 700\tabcellsep 1500\tabcellsep 100\tabcellsep 160\\ x 6\tabcellsep 620 50594 04\tabcellsep 50\tabcellsep 1200\tabcellsep 41.4\tabcellsep 90\end{longtable} \par \caption{\label{tab_1}Table (}\end{figure} \begin{figure}[htbp] \noindent\textbf{2} \par \begin{longtable}{P{0.2633802816901408\textwidth}P{0.5566901408450704\textwidth}P{0.029929577464788734\textwidth}} Year 2015\tabcellsep \tabcellsep \\ 68\tabcellsep Where:\tabcellsep \\ I\tabcellsep \tabcellsep \\ e XV Issue VI Version\tabcellsep \tabcellsep \\ Global Journal of Researches in Engineering ( ) Volum J\tabcellsep ? 200000 + 50000 ?? ?2 ?? ?1, ?? ?2, ?? ? ?? , ?? ? ?? , i= 1. 2, ?, n are fuzzy parameters. 30 + 4 Where:\tabcellsep ? ? ?? 2 +\\ \tabcellsep The fuzzy parameters are represented by the following membership function.\tabcellsep \end{longtable} \par {\small\itshape [Note: © 2015 Global Journals Inc. (US)]} \caption{\label{tab_2}2 ?}\end{figure} \begin{figure}[htbp] \noindent\textbf{(} \par \begin{longtable}{P{0.40857487922705316\textwidth}P{0.06159420289855073\textwidth}P{0.06159420289855073\textwidth}P{0.06159420289855073\textwidth}P{0.06364734299516908\textwidth}P{0.018478260869565215\textwidth}P{0.018478260869565215\textwidth}P{0.05543478260869565\textwidth}P{0.030797101449275364\textwidth}P{0.03900966183574879\textwidth}P{0.030797101449275364\textwidth}} Subject to:\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \\ \tabcellsep ?? ?? ??\tabcellsep ?? ?? ??\tabcellsep ?? ?? ??\tabcellsep ?? ?? ??\tabcellsep S j\tabcellsep T j\tabcellsep Q j\tabcellsep R j\tabcellsep M j\tabcellsep N j\\ ?? 1\tabcellsep 3\tabcellsep 4\tabcellsep 7\tabcellsep 10\tabcellsep 3.5\tabcellsep 8.5\tabcellsep \tabcellsep \tabcellsep \\ ?? 2\tabcellsep 1\tabcellsep 2\tabcellsep 3\tabcellsep 4\tabcellsep 1.5\tabcellsep 3.5\tabcellsep \tabcellsep \tabcellsep \\ ?? 1\tabcellsep 1\tabcellsep 2\tabcellsep 4\tabcellsep 6\tabcellsep \tabcellsep \tabcellsep 1.5\tabcellsep 5\tabcellsep \\ ?? 2\tabcellsep 1\tabcellsep 3\tabcellsep 4\tabcellsep 6\tabcellsep \tabcellsep \tabcellsep 2\tabcellsep 5\tabcellsep \\ ?? 3\tabcellsep 1\tabcellsep 3\tabcellsep 6\tabcellsep 8\tabcellsep \tabcellsep \tabcellsep 2\tabcellsep 7\tabcellsep \\ ?? 4\tabcellsep 1\tabcellsep 2\tabcellsep 3\tabcellsep 5\tabcellsep \tabcellsep \tabcellsep 1.5\tabcellsep 4\tabcellsep \\ ?? 5\tabcellsep 1\tabcellsep 2\tabcellsep 3\tabcellsep 5\tabcellsep \tabcellsep \tabcellsep 1.5\tabcellsep 4\tabcellsep \\ ?? 6\tabcellsep 1\tabcellsep 2\tabcellsep 4\tabcellsep 6\tabcellsep \tabcellsep \tabcellsep 1.5\tabcellsep 5\tabcellsep \\ ?? 7\tabcellsep 1\tabcellsep 2\tabcellsep 3\tabcellsep 5\tabcellsep \tabcellsep \tabcellsep 1.5\tabcellsep 4\tabcellsep \\ ?? 8\tabcellsep 2\tabcellsep 4\tabcellsep 7\tabcellsep 8\tabcellsep \tabcellsep \tabcellsep 3\tabcellsep 7.5\tabcellsep \\ ?? 9\tabcellsep 1\tabcellsep 2\tabcellsep 3\tabcellsep 5\tabcellsep \tabcellsep \tabcellsep 1.5\tabcellsep 4\tabcellsep \\ ?? 10\tabcellsep 1\tabcellsep 2\tabcellsep 5\tabcellsep 7\tabcellsep \tabcellsep \tabcellsep 1.5\tabcellsep 6\tabcellsep \\ ?? 1\tabcellsep 1\tabcellsep 2\tabcellsep 3\tabcellsep 5\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep 1.5\tabcellsep 4\\ ?? 2\tabcellsep 3\tabcellsep 5\tabcellsep 7\tabcellsep 9\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep 4\tabcellsep 8\\ ?? 3\tabcellsep 2\tabcellsep 4\tabcellsep 7\tabcellsep 9\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep 3\tabcellsep 8\\ ?? 4\tabcellsep 3\tabcellsep 5\tabcellsep 7\tabcellsep 9\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep 4\tabcellsep 8\\ ?? 5\tabcellsep 2\tabcellsep 4\tabcellsep 4\tabcellsep 6\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep 3\tabcellsep 5\\ ?? 6\tabcellsep 2\tabcellsep 4\tabcellsep 5\tabcellsep 7\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep 3\tabcellsep 6\\ ?? 7\tabcellsep 1\tabcellsep 3\tabcellsep 7\tabcellsep 8\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep 2\tabcellsep 7.5\\ ?? 8\tabcellsep 3\tabcellsep 4\tabcellsep 5\tabcellsep 7\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep 3.5\tabcellsep 6\\ ?? 9\tabcellsep 2\tabcellsep 4\tabcellsep 4\tabcellsep 6\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep 3\tabcellsep 5\\ ?? 10\tabcellsep 1\tabcellsep 2\tabcellsep 3\tabcellsep 5\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep 1.5\tabcellsep 4\\ \multicolumn{6}{l}{Then the problem takes the following non-fuzzy (Crisp) form:}\tabcellsep \tabcellsep \tabcellsep \tabcellsep \\ \multicolumn{2}{l}{??????. ?? = ?? 1 ?? 1 + + ?? 2 ?? 2 ?}\tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \tabcellsep \end{longtable} \par \caption{\label{tab_3}Table ( 2}\end{figure} \begin{figure}[htbp] \noindent\textbf{(} \par \begin{longtable}{P{0.30357142857142855\textwidth}P{0.10677339901477834\textwidth}P{0.32241379310344825\textwidth}P{0.11724137931034483\textwidth}} \multicolumn{3}{l}{the membership functions determination and the ?-}\tabcellsep \\ cut.\tabcellsep \tabcellsep \tabcellsep \\ 2.\tabcellsep \tabcellsep \tabcellsep \\ Year 2015\tabcellsep \tabcellsep \tabcellsep \\ 70\tabcellsep \tabcellsep \tabcellsep \\ I\tabcellsep \tabcellsep \tabcellsep \\ e XV Issue VI Version\tabcellsep \tabcellsep \tabcellsep \\ ( ) Volum J\tabcellsep \tabcellsep \tabcellsep \\ Global Journal of Researches in Engineering\tabcellsep Variable Name x 1 x 2 x 3 x 4 x 5 x 6 x 7\tabcellsep Company Part Number 450 501 22 01 450 501 70 01 450 501 24 01 450 501 19 01 620 50591 04 620 50594 04 630 501 01 01\tabcellsep 0.5 Optimum Quantity 36 900 4900 750 805 65 750\\ \tabcellsep x 8\tabcellsep 655 501 86 01\tabcellsep 1600\\ \tabcellsep x 9\tabcellsep 350 501 19 01\tabcellsep 750\\ \tabcellsep x 10\tabcellsep 560 501 22 01\tabcellsep 55\\ VI.\tabcellsep \tabcellsep \tabcellsep \end{longtable} \par {\small\itshape [Note: Conclusion]} \caption{\label{tab_4}Table ( 3}\end{figure} \footnote{© 20 15 Global Journals Inc. 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