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Omogbai Oleghe
Cranfield University
10Publications
2H-index
23Citations
Publications 10
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Purpose The purpose of this paper is to promote a system dynamics-discrete event simulation (SD-DES) hybrid modelling framework, one that is useful for investigating problems comprising multifaceted elements which interact and evolve over time, such as is found in TPM. Design/methodology/approach The hybrid modelling framework commences with system observation using field notes which culminate in model conceptualization to structure the problem. Thereafter, an SD-DEShybrid model is designed for ...
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#1Omogbai Oleghe (Cranfield University)H-Index: 2
#2Konstantinos Salonitis (Cranfield University)H-Index: 24
Purpose This study aims to seek to advance a system dynamics-discrete event hybrid simulation modelling concept useful for taking improvement decisions where one needs to consider the interactions between human factors and process flow elements in lean manufacturing systems. Design/methodology/approach A unique approach is taken to hybrid simulation modelling where the whole problem situation is first conceptualized using a causal loop diagram and stock and flow diagram, before transmitting to a...
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Dec 9, 2018 in WSC (Winter Simulation Conference)
#1Omogbai Oleghe (Cranfield University)H-Index: 2
#2Konstantinos Salonitis (Cranfield University)H-Index: 24
This paper promotes a unique system dynamics-discrete event simulation hybrid modelling framework. The way the hybrid model is developed is intended to simplify the modelling process and make the framework flexible to a variety of situations. In the current study, the framework is used to investigate the success possibility of introducing within-shift job rotation in the plant and its optimal frequency. The intention is to reduce worker exhaustion and by so doing increase productivity and manufa...
Source
Dec 9, 2018 in WSC (Winter Simulation Conference)
#1Omogbai Oleghe (Cranfield University)H-Index: 2
The field of System Dynamics-Discrete Event Simulation (SD-DES) hybrid modelling is fragmented with no standardized or structured format for framing a SD-DES hybrid modelling-based study. This work develops a SD-DES hybrid modelling framework to address the research gap. The developed SD-DES hybrid modelling framework is one where the modelling process is an iterative and interactive one that evolves as the hybrid is developed, making it simple, straightforward and amenable to a variety of syste...
#1Omogbai Oleghe (Cranfield University)H-Index: 2
#2Konstantinos Salonitis (Cranfield University)H-Index: 24
This chapter presents the most recent developments with regards the assessment of leanness in manufacturing organizations. Leanness is the measure of the performance of lean manufacturing practices. It is tracked for improvement using assessment frameworks. This chapter reviews prevalent frameworks in order to organize the knowledge, extract the typical and potential uses, establish strengths and weaknesses and reveal ways of improving the extant frameworks. Prevailing frameworks are identified ...
1 CitationsSource
The lean index is a holistic measure of lean performance. Its assessment has been approached using qualitative and quantitative-based methods. While the qualitative based methods are of the self-assessment type, there is no such congruence with quantitative-based ones. This inconsistency can lead to confusion as to which quantitative-based methods should be adopted for specific situations. We attempt to address this issue by applying and comparing some quantitative-based methods within a manufac...
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#1Omogbai Oleghe (Cranfield University)H-Index: 2
#2Konstantinos Salonitis (Cranfield University)H-Index: 24
Abstract The lean index is the sum of weighted scores of performance variables that describe the lean manufacturing characteristics of a system. Various quantitative lean index models have been advanced for assessing lean manufacturing performance. These models are represented by deterministic variables and do not consider variation in manufacturing systems. In this article variation is modeled in a quantitative fuzzy logic based lean index and compared with traditional deterministic modeling. B...
14 CitationsSource
#1Omogbai Oleghe (Cranfield University)H-Index: 2
#2Konstantinos Salonitis (Cranfield University)H-Index: 24
Abstract Multiple lean metrics representing performance for various aspects of lean can be consolidated into one holistic measure for lean, called the lean index, of which there are two types. In this article it was established that the qualitative based lean index are subjective while the quantitative types lack scope. Subsequently, an appraisal is done on techniques for quantifying qualitative lean metrics so that the lean index is a hybrid of both, increasing the confidence in the information...
8 CitationsSource
In a job–shop environment, achieving a schedule that is on target is difficult due to the dynamism of factors affecting the system. In this paper the Shewart's Individuals control chart is applied to a scheduling process for the purpose of measuring schedule performance. The charts are applied to monitor the deviations of actual from scheduled process times for jobs on a process machine. Data transformation operations are used to counter the negative effects of non–normal data. The proposed meth...
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