Industrial Technology Commons^™

Determination Of A Flexibility Range For Cellular Manufacturing Systems Under Product Mix Variations, Hamid Seifoddini, Manocher Djassemi

Industrial Technology and Packaging

One of the underlying assumptions in cellular manufacturing is that product mix is relatively stable over time. In this paper, a procedure for the sensitivity analysis of the performance of a cellular manufacturing system with respect to changes in the product mix is presented and a flexibility range representing the capability of the system in dealing with these changes is determined using simulation modelling. The simulation results in this study show that as the changes in the product mix increase the superiority of the performance of the cellular manufacturing system to the corresponding job shop system diminishes.

Minimizing Post-Production Weight Growth In Tanks Using A Decision Analysis Model, Michael F. Cochrane

Engineering Management & Systems Engineering Theses & Dissertations

Post-production weight growth of tanks is an historic problem for the military. Tanks are difficult to transport because of their weight, and post-production modifications tend to cause this weight to increase over the lifecycle of the tank. In this thesis, a computer model is constructed which uses influence diagrams to model tank weight growth as a probabilistic process. Historical weight data for the MI Abrams tank program is used to derive probabilities for the model. The model is used to predict tank weight growth over both the short and long term with the goal of understanding more about how and …

Lithographers' Opinions About Waterless Lithography, Devang Pranlal Mehta

Dissertations and Theses @ UNI

The purposes of this study were to identify the advantages and disadvantages of waterless litho in comparison with traditional litho, to solve the controversial issues, to forecast the growth of waterless litho, and to inform graphic arts professionals about it. The problem of this research was to identify and measure perceived controversial issues for using the waterless litho process. These controversial issues were related to the return on investment and operating costs involved, productivity, quality of images, eco-friendliness, and technical problems associated with waterless litho.

Due to the fact that waterless litho was a developing technology and some controversial issues …

Perceptions Of Businesses On Environmental Regulatory Information, Kimberly K. Gunderson

Dissertations and Theses @ UNI

The purpose of this study was to determine the source and amount of information that a sample of businesses receive on environmental regulatory topics and from what sources they would prefer to receive this information. More specifically, the study demonstrated the discrepancy between the sources from which businesses currently receive their information and the sources from which they would prefer to receive it. The study also addressed how relevant this information was to the businesses and with which regulations the businesses were the most and least knowledgeable. The study was done by conducting a mail-back survey of 500 Iowa small …