396 PLIV. Prestrilir Ali Application Case 9.1 (Continued) user interface. When the soker (ILOG CILEX) is intended to give the DSS tool the capability to con- min, an optimal solution is 1cached at a point when sider outltiple products for a pool of vessels. dit caloje.live value of the incumbent solutions ANSWER THE BELOWB3BQUESTION IN WORD FILE improving. '17 s stopping criterion is clutcernind hy DISCUSSION QUESTTONS the user during cach program in 1. Listi. Hree ways in which nunul sulieduling 1 slips could result in tim! Opuri, il costas Results/Benefits compared to the oxal cicycloped 2. In wulher ways car lexxon14101il leverage the It was cxpccted that using the optinization model decision support tool developed to expand can: will lead to reduced shipping cost and less denui optimizc thcir other business opcrtions? raye expenses. These would le cieved because 3. Wil :17SOC 477-yie k cisititas tub chall the tool wouki bezahl: 10% suppori higher utilization be made by kvision makers using the tool of ships and help makc ship sclection (c.g., l'animax versus Aframax) and design 11010 optional rouring developec. chiedles. The researchers expected l extend the Source. K. Cuan, J. II. Scary. G. R. Kecis. M. K. McDonald, rescarch by exploring other alternate mathematical and I'. H. Will, "Feedstex Routing in the Exco Mold methods to solve the scheduling problem. They uso Downacar Scor" Interfaces, vol. 49, No.2.2011. pp. 14163. Current Modeling Issues Vt next das seme rajer modeling issuks, such as portlern iderilication and envi- rormental analysis, variahk iientification, torcasting, the use of multipk- morkels, morkel categorics (or appropriare scloction), model maragement, and knowledge based modeling IDENTIFICATION OF THE PROBLEM AND ENVIRONMENTAL ANALYSIS One very impor- tant aspect of it is environmental scanning and analysis, which is the monitoring, scanning, and interpretation of collected information. No decision is made in a vacuun. It is importati lo zualize nie op die drain and the Trees and dynamics of the cervironment. A ckwisior maker reels to icentify the organizational culture and the corporate decision making processes (c.g.. who makes decisions, degree of centm.iza tion). It is entirely possible that e:wironmental factors have created the current problem BIASIS and vlies (BA) LEXO's can help ikutily [23:2. Testy unity or idem. The problem must be understood and everyone involved should share the site trime of understanding, because the problem will ultimately be representer by tic model in one form or anodiet. Oderwise, the model will not help the decision maker. VARIABLE IDENTIFICATION Idearification of a model's wariables (c.g., decision, scsult, unconcollable) is critical, as are the relationships among the variables. Influence diagrams, which are yrapybrie al models clauletalicz. 1.cd=ls, cz: luciale tie idemilication process. A more general form of an influcncc