Traditional odd lot trades (i.e., involving fewer than 100 shares) now comprise over half of all equity on U.S. exchanges. Under Regulation National Market System, however, these are excluded from a market center’s trade execution statistics. In addition, while brokers required to consider quotes as part their duty best execution, formally the calculation national bid and offer. This Article, w...

Article history: Received 1 August 2011 Accepted 28 October 2011 Available online 29 October 2011 Recently, the economic lot scheduling problem (ELSP) with common cycle time and shelf life restrictions has attracted the attention of several researchers. In this paper, a comparative study of solutions given by Xu and Sarker (2003) [Computers & Operations Research 30 (6), 925938] with the results...

We consider the production of multiple standardized products on a single machine with limited capacity and set-up times under random demands and random production times, i.e., the so-called stochastic economic lot scheduling problem (SELSP). The main task for the production manager in this setting is the construction of a production plan for the machine that minimizes the total costs, i.e., the...

Richard H. Wilson Veterans Administration Medical Center Mountain Home, TN Audibility thresholds for a 1000-Hz sinusoid were measured with a standard clinical (CLIN) procedure and a two-interval, forced-choice (21FC) adaptive procedure bracketing 79% correct. Both used 2and 5-dB step sizes in quiet and in a continuous, broadband noise background. Clinical thresholds were from 2 to 4 dB higher t...