this paper discusses the performance evaluation and availability analysis of ammonia synthesis unit of a fertilizer plant. the fertilizer plant is a complex and repairable engineering system comprises of various units viz. shell gasification and carbon recovery, desulphurization, co-shift conversion, decarbonation, nitrogen wash and ammonia synthesis etc. one of the most important functionaries...

GQM+Strategies is an approach that aligns the business goals at each level of an organization to strategies to achieve overall business goals and assesses the achievement of such goals. Strategies are extracted from business goals based on rationales (contexts and assumptions). Using the proposed approach, which refines the GQM+Strategies model by extracting rationales based on the analysis of ...

This study aims to select optimal maintenance strategy for components of an electric motor of the National Iranian Oil Refining and Distribution Company. In this regard, a method based on revised multi choice goal programming and analytic hierarchy process (AHP) is presented. Since improving the equipment reliability is an important issue, reliability centered maintenance (RCM) strategies are i...

results patients reported that their use of methamphetamine was motivated by methadone’s side effects and encouraged by family and friends who promoted methamphetamine use to assuage the side effects of methadone in the early stages of treatment before the appearance of methadone maintenance therapy’s effects on their life. patients and methods to gain a better understanding of patients’ motiva...

To achieve overall business goals, GQM+Strategies® is an approach that aligns the business goals at each level of an organization to strategies and assesses the achievement of goals. Strategies derived from business goals are based on rationales (context factors and assumptions). Because extracting all rationales is an important process in the GQM+Strategies approach, we propose Context-Assumpt...

Conservation tillage (CT) systems have a number of potential benefits including lower crop production costs and the ability to reduce soil erosion that have made them common in several regions of the world. Although CT systems have been researched and successfully implemented on some farms in California's San Joaquin Valley (SJV), overall adoption is low and the reasons for the region's compara...

Phase 1: Study a significant number of maintainers to thoroughly understand the nature of their work. This paper investigates the questions to ask in such a study. A companion paper [1] discusses some methods by which the questions can be answered. Phase 2: Develop and evaluate tools to help the maintainers work better. This work will be based on what we learn from phase 1, as well as ongoing i...