We study the approximability of minimum total weighted tardiness with a modified objective which includes an additive constant. This ensures the existence of a positive lower bound for the minimum value. Moreover the new objective has a natural interpretation in Just-In-Time production systems.

The focus of this chapter is the provision of teacher professional development as needed – just in time. The specific context is the application of peer mentoring in teaching and learning with interactive whiteboards. Data was gathered from two research projects that investigated aspects of teachers mentoring colleagues in Australia. In both projects lessons were video recorded and the teachers...

Lean manufacturing impacts several operational performances. The usefulness of JIT links with suppliers is also well known. However, literature lacks strong empirical evidences to exhibit the relationship between lean manufacturing, operational performances and JIT linkages with suppliers. This paper aims to investigate this relationship. A questionnaire-based international survey was used to o...

Materials Requirements Planning (MRP) and Just-in-Time (JIT) are currently two of the most popular manufacturing technologies. Based on 246 Chinese companies’ survey, we found that the degree of the MRP and JIT implementation and integration has a positive relationship with the manufacturer’s performance. The hybrid MRP and JIT system, which create synergy and attains better performance, is wid...

Nowadays, companies are struggling to find an appropriate supply chain strategy to achieve competitiveness. Among the available strategies lean, green and resilient are considered as a new management strategies for the supply chain management to achieve competitiveness. The major issues with theses strategies are the integration and identification of critical issues related to the strategies. T...

With the widespread use of manufacturing philosophies such as Just-In-Time (JIT), emphasis has shifted to the simultaneous consideration of cardinal and ordinal data in supplier selection process. Traditionally, many optimization models of supplier selection assume that the average prices of related expenditures are constant. This is far beyond the real situation. In fact, suppliers usually off...

Although a great deal of successful research has been carried out in just-in-time (JIT) philosophy, few researchers have focused on the adaptation of JIT philosophy in service systems. Despite the recent improvements in the service systems, few studies have been carried out which examine the effects of the JIT philosophy on service systems which have a different structure to production systems....

The present study evaluates the effectiveness of Just-In-Time Hints (JITs) by testing two competing hypotheses about learning from errors. The tutor-remediation hypothesis predicts that students learn best when a tutoring system immediately explains why an entry is incorrect. The self-remediation hypothesis predicts that learning is maximized when learners attempt to correct their own errors. T...

Although personalised eLearning can offer many tangible benefits to the entire educational process such as teacher and learner empowerment [Conlan et. al. 2004] [Bajraktarevic et. al. 2003], educational community collaboration and tailored eLearning delivered just in time and just for you, several issues restrict its mainstream appeal. These issues relate to the technical coordination of buildi...