This paper investigates a portfolio approach to multi-product newsboy problem with budget constraint, in which the procurement strategy for each newsboy product is designed as portfolio contract. A portfolio contract consists of a fixed-price contract and an option contract. We model the problem as a profit-maximization model, and propose an efficient solution procedure after investigating the ...

The paradigm shift from testing the outcome to assessing the learning of process shines a light on the alternative assessment approaches, among which portfolio-assessment has sparked researchers’ interest in writing instruction. This study aimed at investigating the effect of portfolio-assessment on Iranian EFL students’ writing achievement through the process-centered approach to writi...

A critical challenge faced by mobile app developers today is to effectively manage their app portfolio, but this issue has rarely been addressed in the IS academic literature. To address this gap, we focus on the impact of category assortment of developers’ app portfolios on their performance. Specifically, we evaluate both the supply and demand of mobile apps with a data set from the Apple App...

in the research we try to introduce “network matrix” in selecting optimizing portfolio for active management in investment companies, to evaluating obtained portfolio of this, with this aim that have high efficiency in relation to market portfolio efficiency. first matrix (portfolio) is value-growth stocks that are classified by standards p/e and p/b and second matrix (portfolio) are an aggress...

Many product development methodologies strategically allocate resources to create a portfolio of technology projects. These methodologies work well for projects that are predominantly independent of one another and occur in a common funding cycle. When the projects become interdependent, the complexity of optimizing even a moderate number of projects over a small number of objectives and constr...

BoostAeroSpace AirDesign, standard of PLM collaboration in the Aerospace Industry 10h45-11h15 Coffee break 11h15-11h45 Academic keynote: Technological uncertainty, pyschological safety and knowledge maturation: the case of New Product Development 11h45-12h15 Industrial Keynote: Philippe Berthouloux and Sébastien Blanchard, STX Europe, France PLM implementation for a shipbuilding industry 12h15-...

Optimization of the product portfolio has been recognized as a critical problem in industry, management, economy and so on. It aims at the selection of an optimal mix of the products to offer in the target market. As a probability function, reliability is an essential objective of the problem which linear models often fail to evaluate it. Here, we develop a multiobjective integer nonlinear cons...