Modeling the Sequence Dependent Lateness of a Single Workstation

Abstract

Due date reliability is a critical competitive factor for manufacturing companies and hence a central objective in logistics. Nonetheless, many businesses are unable to meet their own schedule reliability standards. The reasons for the insufficient achievement of logistical targets are inherent in the diverse and interdependent influential factors that affect schedule reliability. However, logistical models enable to determine these interdependencies. This paper introduces the operating curves of output lateness of a single workstation for various sequencing methods. The parameter studies comprise the preliminary work necessary to provide a complete, model-based description of production schedule deviations.

Logistics-Oriented Production Configuration Using the Example of MRO Service Providers

“…In production areas like these and at individual work systems, there is a fundamental conflict of objectives between the level of WIP and the logistics objectives of a short throughput time and a high output rate, as shown by the production operating curves (a) [1]. Furthermore, (b) the chosen sequencing procedure [5,35] and (c) possible prioritisations of rush or fast-track orders have an impact on throughput time (variability) and schedule deviation characteristics [6]. The prioritisation offers the possibility to accelerate material supply for downstream processes actively.…”

“…The effect of different procedures for sequencing on logistics objectives can be well described quantitatively by logistics models (cf. section II.B) [5,35,85]. Thus, the selected procedure decisively determines the actual sequence in the output, which, in comparison with the planned sequence in the output, affects the control variable sequence deviation in the output and thus on the objective schedule reliability in the output [29,40].…”