This study assessed the test-retest reliability/repeatability and 95 percent confidence intervals (CIs) of the Tinnitus Handicap Inventory (THI) and developed categories for classifying self-perceived tinnitus handicap severity. Twenty-nine adults with tinnitus as their primary auditory complaint served as subjects. The THI was administered on two occasions (mean interval 20 days) using a paper...

In many inventory control contexts, inventory levels are only partially (i.e., not fully) observed. This may be due to non-observation of demand, spoilage, misplacement, or theft of inventory. We study a discrete-time periodic-review inventory system where the unmet demand is backordered. When inventory level is nonnegative, the inventory manager does not know the exact inventory level. Otherwi...

The objective of this study is to rigorously examine the effects of RFID on suppliers’ profitability while adjusting for endogeneity bias arising from the decision process for RFID adoption. To this end, we use a Heckman two-stage estimation method, which allows us to control for endogeneity between a firm’s organizational characteristics and its decision for RFID adoption. We find that supplie...

For over a decade, the Kellogg Company has used its planning system (KPS), a large-scale, multiperiod linear program, to guide production and distribution decisions for its cereal and convenience foods business. An operational version of KPS, at a weekly level of detail, helps determine where products are produced and how finished products and in-process products are shipped between plants and ...

BACKGROUND The study aimed to evaluate the level of burnout among the clinical dental students in two Jordanian universities. METHODS A total of 307 students from the two schools were surveyed using Maslach Burnout Inventory survey. Scores for the inventory's subscales were calculated and the mean values for the students' groups were computed separately. Kruskal-Wallis and Mann-Whitney tests ...

We consider a single-echelon, single-item inventory system where both demand and lead-time are stochastic. Continuous review policy is used to control the inventory system. The objective is to calculate the reorder point level under stochastic parameters. A case study is presented in Neonatal Intensive Care Unit. Keywords—Inventory control system, reorder point level, stochastic demand, stochas...

Producing companies aspire to availability despite appearing disruptions. To ens availability safety stocksare required. Howeversaf additional capital commitment and compensates d of solving the reasons.The intention is to increa production by configuring the production plan systematically. Thus the safety stock can be red proportion of inventory in producing companies i inventory, schedule dev...