The presence of variability in life cycle analysis (LCA) is inherent due to both inexact LCA procedures and variation of numerical inputs. Variability in LCA needs to be clearly distinguished from uncertainty. This paper uses specific examples from the production of diesel and jet fuels from 14 different feedstocks to demonstrate general trends in the types and magnitudes of variability present...

Virtually all manufacturing and service industries are susceptible to periods of supply and demand mismatches. Due to capacity limitations and demand uncertainties, firms producing multiple products may frequently encounter instances where one of their products faces shortages while the other has excess inventories. In order to alleviate the level of such inventory mismatches, several tools may...

This paper studies operations sequencing for a multi-stage production inventory system with lead times under predictable (deterministic) yield losses in the presence of uncertain demand, with full or partial release of work-in-process (WIP) inventories, for preor post-operation cost structures, and under the total discounted or average cost criteria. We derive necessary and sufficient criteria ...

Purpose: To produce up-to-date inventories for satisfaction and Likert scales that contain commonly used scale point descriptors and their respective mean scale values and standard

OBJECTIVES The fall in the prevalence of left handedness with age has been attributed to either premature mortality or a cohort effect of forced dextrality. Evidence for forced dextrality was sought to differentiate between these competing theories. DESIGN 6097 Edinburgh handedness inventories were used to calculate laterality quotients (LQ) with and without the questions relating to writing ...

one of the important issues in the field of organizational decisions is determine the optimal time of use the equipment. managers should take proper decision to repair, rebuild or replace the equipment, so that the greatest benefit and the least cost to the organization. in the military, moving units, items, equipment and manpower, is the part of the logistics system mission. in this regard, th...

introduction: nowadays, more than 10,000 different types of medical devices can be found in hospitals. this way, medical electrical equipment is being employed in a wide variety of fields in medical sciences with different physiological effects and measurements. hospitals and medical centers must ensure that their critical medical devices are safe, accurate, reliable and operational at the requ...

abstract background and objective: having knowledge about potential risks and the usage of safety equipment in laboratories can decrease the risk of occupational exposure. the aim of this study was to evaluate the predisposing factors for occupational exposure and to assess the usage of safety equipment among personnel of medical diagnostic laboratories in birjand. material and methods: in this...