The productivity change of a decision making unit (DMU) between two time periods can be evaluated by the Malmquist productivity index. In this study, we propose a method to compute the Malmquist productivity index in several time periods (from the first to the last periods) on interval data in data envelopment analysis (DEA). Then, the obtained Malmquist productivity index is compared with Malm...

this research aims at presenting a consolidated model of data envelopment analysis (dea) technique and value engineering to select the best manufacturing methods for gate valve covers and ranking the methods using topsis.to do so, efficiency evaluation indices were selected based on the value engineering approach and different manufacturing methods were evaluated using dea technique.finally, ef...

Environmental Performance Index (EPI) is used to rank the performance in environment protection for most of the countries in the world. EPI is a score which gives a gauge at a national government scale using the method of proximity-to-target value. The current method fails to consider incomplete and vague environment data in its computations. This paper proposes a new score of EPI using a decis...

In May of 1980 the Association of Research Libraries (ARL) adopted new criteria for membership in the association based, in large part, on what is known as the ARL Library Index. 1 This index is derived from a model containing ten categories, or variables, which characterize library size. While the Library Index model was developed as a measure of an institution's overall standing relative to t...

When you need to unearth articles on your topic of interest, do you visit your nearest hospital/medical library ? If so, do you head for the librarian and ask for a search to be done or do you make for the shelves holding Index Medicus ? If the former you will probably observe that the librarian goes to Index Medicus to carry out your search for you and you will be lucky if your search is done ...

In helping consumers to make a wise decision in purchasing a personal computer (PC), the use of multi-criteria decision analysis methods is a way to provide ranking of the attributes of PCs and to construct the computer preference index (CPI). This paper employs the Rank Ordered Centroid (ROC) method to do the ranking. The findings reveal that the most important attribute is the CPU, followed b...

In order to achieve the goal of maximizing returns, market traders tend buy and sell assets with high volatility. Now, in this paper, will only two assets, namely gold, bitcoin, based on their requirements, using past daily prices determine trading whether they should buy, continue hold, or portfolio that date. Determine a consisting cash, bitcoin is an investment model for five-year period sta...