A cyclic production system manufactures a set of products at a constant frequency. Each resource repeatedly performs a certain set of tasks, and the system produces a certain set of units each cycle. The production schedule defines the timing of the tasks within each cycle, which determines system performance on measures such as throughput and work-in-process inventory. This paper describes the...

In today's competitive manufacturing systems it is critical to be responding quickly to the demands of customers and decreasing total cost of production. Long cycle times are associated with higher costs of work in process (WIP), increased demand forecasting errors, and lower yields due to slower control feedback. Automated Assembling Shop (AAS) is a class of systems exhibiting concurrency and ...

Growth factor stimulation induces the formation of dynamic actin structures known as dorsal ruffles. Mammalian actin-binding protein-1 (mAbp1) is an actin-binding protein that has been implicated in regulating clathrin-mediated endocytosis; however, a role for mAbp1 in regulating the dynamics of growth factor-induced actin-based structures has not been defined. Here we show that mAbp1 localizes...

The IC packaging industry relies heavily on shop floor information, necessitating the development of a data model to flexibly define shop floor information in the production flow. For this purpose, this work designs a novel data model by using IDEF1x. The proposed data model consists of four modules: operation template setup, general process setup, enhanced bill of manufacture (EBOMfr) setup, a...

 Inventory plays a major role in deciding the overall manufacturing costs, and a good scheduling system should balance the on-time delivery of products versus low work-in-process (WIP) inventory. In this paper, the “CONstant Work-In-Process” (CONWIP) concept is applied to job shop scheduling to effectively control WIP inventory. A new mathematical formulation of CONWIP-based job shop schedulin...

We developed an event-driven simulator of the Kanban process a WIP limited pull system visualized by the Kanban board. WIP(work in process) represent the capacity in the activity to perform features simoultaneously. The simulator is fully object-oriented, and its design model reflects the objects of the Lean software development domain. We used this simulator to assess comparatively WIP-limited...

In this paper an aggregate model for manufacturing systems consisting of flow lines with finite buffers and parallel servers is proposed. The proposed model is a multi-server station with process times depending on the work in process (WIP). An algorithm is developed to measure the WIP-dependent process times directly from industrial data such as arrival times at and departure times from the ma...

The operational cost of 300mm wafer production is significantly greater than that of 200mm fabs. Real-time monitoring of product can save time and money through reduced scrap and decreased cycle time. Current process monitoring generally incorporates stand-alone metrology, which is time consuming and requires excessive wafer handling by production operators. The benefits of integrated metrology...

Research has argued that the way learning activities are sequenced over different social levels has an effect on learning effectiveness. This study investigates the effect of embedding an individual preparation phase prior to collaborative concept mapping (CCM) on the epistemic and social dimension of the CCM process. Using a quasi-experimental design, a multi-disciplinary group of 24 3rd year ...