scholarly journals An Empirical Investigation of the Relationship between Overall Equipment Efficiency (OEE) and Manufacturing Sustainability in Industry 4.0 with Time Study Approach

2018 ◽  
Vol 10 (9) ◽  
pp. 3031 ◽  
Author(s):  
Poorya Ghafoorpoor Yazdi ◽  
Aydin Azizi ◽  
Majid Hashemipour
Keyword(s):  
Flexible Manufacturing ◽  
Industry 4.0 ◽  
Material Handling ◽  
Sustainable Manufacturing ◽  
Fast Response ◽  
Study Data ◽  
Time Study ◽  
High Productivity ◽  
Affective Factors ◽  
Study Results

Nowadays, small and medium sized enterprises (SMEs) are becoming increasingly competitive. In order to fulfill the rapidly changing market and diversified demands of customers, the SMEs need to achieve and maintain high productivity and quality, with fast response, sufficient flexibility, and short lead times. Therefore, Industry 4.0 offers various manufacturing paradigms that might be a solution in order to increase the productivity of SMEs such as intelligent and flexible manufacturing. Furthermore, in the last decade, the emphasis on adopting eco-friendly practices, implementing sustainability measures, and protecting the environment has continued to grow, to gain traction across SMEs. In fact, because of this need, many SMEs are now adopting sustainable manufacturing practices in response to this increased focus on sustainability and environmental stewardship. The main purpose of this paper is to design and study the implementation of a sustainable, intelligent material handling system for material distribution with utilizing an agent-based algorithm as control architecture. A time study-based methodology has been implemented to evaluate the overall equipment effectiveness (OEE) to identify the matters that need to be resolved and optimized to increase the OEE percentage with consideration of the sustainability of the system. An exhaustive analytical trend applied to the generated time study data. Accordingly, further hardware, software, and layout design limitation and problems detected, and the proper solutions were anticipated. The observed time study results were presented, a fundamental set of analytical observation and information with associated histograms was reviewed. In addition, the study aims to recognize and analyze effective factors on the sustainability of improved processes, using a simple model. To do this, using experts’ viewpoints, affective factors on the sustainability of process improvement activities are determined.

scholarly journals A Hybrid Methodology for Validation of Optimization Solutions Effects on Manufacturing Sustainability with Time Study and Simulation Approach for SMEs

2019 ◽  
Vol 11 (5) ◽  
pp. 1454 ◽  
Author(s):  
Poorya Ghafoorpoor Yazdi ◽  
Aydin Azizi ◽  
Majid Hashemipour
Keyword(s):  
System Performance ◽  
Industry 4.0 ◽  
Material Handling ◽  
Synergistic Effects ◽  
Production Quality ◽  
Real System ◽  
The Other ◽  
Time Study ◽  
The Real ◽  
Hybrid Methodology

The properties of small- and medium-sized enterprises (SMEs) make them one of the most important categories of enterprises for the economics of challenging world. SMEs, in most countries, are still enterprises with marketing and financial challenges. In addition, most of these challenges are related to their production and product characteristics. On the other hand, SMEs should fulfil the costumer’s demands. In order to reach these goals, SMEs must reach the highest level of production quality and quantity and successfully sustain them. Consequently, various manufacturing paradigms have been offered by an Industry 4.0 concept, which offers a variety of solutions to increase the productivity and enhance the performance of SMEs. It should be noted that implementation of these manufacturing paradigms for SMEs is quite difficult and sometimes risky for several reasons. Still, amidst all these difficulties and challenges, the benefits and idealism of the Industry 4.0 paradigms prevail. From productivity to market, it is difficult to deny that SMEs are frightened by the challenges they face and fleeing from the potential of overcoming them. This paper is an extended version of the research by Ghafoorpoor Yazdi et al. (2018) and conducts a hybrid methodology to satisfy the SMEs by validating and verifying any optimization idea before implementing the Industry 4.0 concept. To reach the study goals, an intelligent Material Handling System (MHS) with agent-based control architecture has been developed. The developed MHS has been utilized for auto parts distribution. The system performance has been evaluated, and some solutions have been provided to optimize the performance of system. To evaluate the target system’s performance, an analytical time study method has been utilized. The time study has an Overall Equipment Effectiveness (OEE) standard approach to identifying the matters that need to be resolved and optimized to increase system performance. The other part of the methodology is generating a simulation model of the real system by use of ARENA® software to evaluate the system’s performance before implementing the optimization idea and modifying the real system. Furthermore, as the sustainability strategies create many synergistic effects for SMEs, after evaluating the effects of the optimization ideas on OEE percentage, the influence of the OEE changes on manufacturing sustainability has been investigated. The results show that optimizing the OEE in SMEs with sustainability approaches can create competitive advantages, rather than simply focusing on reducing unsustainability.

scholarly journals HOLD-TIME STUDY FOR PHARMACEUTICAL TABLET DURING MANUFACTURING PROCESS: AN INNOVATIVE STEP

2018 ◽  
Vol 11 (1) ◽  
pp. 427
Author(s):  
Shaziya Yasmeen Sayeed ◽  
Anju Goyal
Keyword(s):  
Shelf Life ◽  
Hold Time ◽  
Study Data ◽  
Batch Size ◽  
Time Study ◽  
Storage Container ◽  
Drug Products ◽  
Holding Period ◽  
Study Results ◽  
Specific Stage

  Objective: The objective of the study was to ensure that intermediates and the bulk product can be held without any significant adverse effect on the quality of the material till next step of processing. Such a holding period should be based on data. Studies should not be extended to find the edge of failure for holding.Method: Samples are put away in same natural conditions as in manufacturing/storage. After establishing a sampling plan required sample amount based on the batch size is ascertained, the intervals and tests are to be performed. Samples are kept in a storage container and tested. Results are contrasted and the underlying benchmark information of the control test. Hold-time study data shall give the assurance the maximum allowable hold times for bulk and in-process drug products. In general, one lot can be used for validating hold times if any irregularity comes, results were observed then another two lots can be used for this investigation.Conclusion: Each manufacturing stage shelf life can be determined depending on the hold-time study results. If the hold-time samples are passing at 60-day time point, then the shelf life of the specific stage can be considered up to 45 days.

scholarly journals HOLD-TIME STUDY FOR PHARMACEUTICAL TABLET DURING MANUFACTURING PROCESS: AN INNOVATIVE STEP

2018 ◽  
Vol 11 (1) ◽  
pp. 427
Author(s):  
Shaziya Yasmeen Sayeed ◽  
Anju Goyal
Keyword(s):  
Shelf Life ◽  
Hold Time ◽  
Study Data ◽  
Batch Size ◽  
Time Study ◽  
Storage Container ◽  
Drug Products ◽  
Holding Period ◽  
Study Results ◽  
Specific Stage

  Objective: The objective of the study was to ensure that intermediates and the bulk product can be held without any significant adverse effect on the quality of the material till next step of processing. Such a holding period should be based on data. Studies should not be extended to find the edge of failure for holding.Method: Samples are put away in same natural conditions as in manufacturing/storage. After establishing a sampling plan required sample amount based on the batch size is ascertained, the intervals and tests are to be performed. Samples are kept in a storage container and tested. Results are contrasted and the underlying benchmark information of the control test. Hold-time study data shall give the assurance the maximum allowable hold times for bulk and in-process drug products. In general, one lot can be used for validating hold times if any irregularity comes, results were observed then another two lots can be used for this investigation.Conclusion: Each manufacturing stage shelf life can be determined depending on the hold-time study results. If the hold-time samples are passing at 60-day time point, then the shelf life of the specific stage can be considered up to 45 days.

Material Handling Mechanisms Used in Flexible Manufacturing Systems

2012 ◽  
Vol 245 ◽  
pp. 197-202 ◽  
Author(s):  
Lucian Adrian Mihaila
Keyword(s):  
Flexible Manufacturing ◽  
Flexible Manufacturing Systems ◽  
Manufacturing Systems ◽  
Material Handling ◽  
Machining Process ◽  
High Productivity ◽  
Automatic Tool Changer ◽  
Automatic Tool ◽  
The Times ◽  
Small Tool

In small and medium batch series manufacturing the small tool and workpiece changing time is one of the main objectives to follow in obtaining high productivity. These auxiliary times are defined as the times consumed with preparing and changing the next tool or workpiece to follow the machining process, times that usually overlap the machining process. For this purpose machining centres are equipped with an automatic tool changer system and an automatic pallet changer system. The palletizing systems imply eliminating the times consumed with the alignment, fixing and clamping of the workpieces, these systems consisting of several mechanisms: the pallet, the automatic pallet changing mechanism, the positioning mechanism and the pallet clamp/unclamp mechanism. In this paper we present an general overview of the automatic pallet changing mechanisms used both in flexible manufacturing systems and machining centres.

scholarly journals Task Scheduling of Material-Handling Manipulator for Enhancing Energy Efficiency in Flow-Type FMS

2020 ◽  
Vol 14 (6) ◽  
pp. 943-950
Author(s):  
Ryo Yonemoto ◽  
◽  
Haruhiko Suwa
Keyword(s):  
Energy Efficiency ◽  
Task Scheduling ◽  
Flexible Manufacturing ◽  
Material Handling ◽  
Manufacturing System ◽  
Energy Savings ◽  
Sustainable Manufacturing ◽  
Shop Floor ◽  
Flow Type ◽  
Related Information

Energy savings and reduction in environmental burdens are necessitated to enhance sustainable manufacturing performances. Not only should energy consumption in the factory be visualized, but also a mechanism, by which in-process production and energy-related information measured in the shop floor are fed back into planning/scheduling decision-making, must be established to improve the energy efficiency during manufacturing execution. This study addresses the effect of scheduling on the improvement of energy efficiency in manufacturing by connecting a developed measurement and control platform with a real manufacturing system. The manufacturing system testbed utilized in this study forms a simple flow-type flexible manufacturing system composed of automated manufacturing cell with a CNC lathe, material-handling manipulator, and vertical machining center. We focus on the task scheduling of the material-handling manipulator, which yields a job sequence, and the effect of task scheduling of the manipulator on the energy efficiency and productivity of the entire manufacturing system.

scholarly journals Managing overlap of primary study results across systematic reviews: practical considerations for authors of overviews of reviews

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Carole Lunny ◽  
Dawid Pieper ◽  
Pierre Thabet ◽  
Salmaan Kanji
Keyword(s):  
Case Studies ◽  
Systematic Reviews ◽  
Data Extraction ◽  
Methodological Approach ◽  
Study Data ◽  
Primary Study ◽  
Eligibility Criteria ◽  
Overlapping Data ◽  
Study Results ◽  
Yield Trends

Abstract Background Overviews often identify and synthesise a large number of systematic reviews on the same topic, which is likely to lead to overlap (i.e. duplication) in primary studies across the reviews. Using a primary study result multiple times in the same analysis overstates its sample size and number of events, falsely leading to greater precision in the analysis. This paper aims to: (a) describe types of overlapping data that arise from the same primary studies reported across multiple reviews, (b) describe methods to identify and explain overlap of primary study data, and (c) present six case studies illustrating different approaches to manage overlap. Methods We first updated the search in PubMed for methods from the MOoR framework relating to overlap of primary studies. One author screened the studies titles and abstracts, and any full-text articles retrieved, extracted methods data relating to overlap of primary studies and mapped it to the overlap methods from the MOoR framework. We also describe six case studies as examples of overviews that use specific overlap methods across the steps in the conduct of an overview. For each case study, we discuss potential methodological implications in terms of limitations, efficiency, usability, and resource use. Results Nine methods studies were found and mapped to the methods identified by the MOoR framework to address overlap. Overlap methods were mapped across four steps in the conduct of an overview – the eligibility criteria step, the data extraction step, the assessment of risk of bias step, and the synthesis step. Our overview case studies used multiple methods to reduce overlap at different steps in the conduct of an overview. Conclusions Our study underlines that there is currently no standard methodological approach to deal with overlap in primary studies across reviews. The level of complexity when dealing with overlap can vary depending on the yield, trends and patterns of the included literature and the scope of the overview question. Choosing a method might be dependent on the number of included reviews and their primary studies. Gaps in evaluation of methods to address overlap were found and further investigation in this area is needed.

Do intraday week effect in currencies hourly trading reflect leverage and asymmetric anomalies? Policy implications for traders

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Wajid Shakeel Ahmed ◽  
Muhammad Sohaib ◽  
Jamal Maqsood ◽  
Ateeb Siddiqui
Keyword(s):  
Emerging Economies ◽  
Garch Model ◽  
Study Data ◽  
Policy Implications ◽  
Asymmetric Effect ◽  
Data Set ◽  
Content Type ◽  
Study Results ◽  
Rational Choices ◽  
Trading Pattern

Purpose The purpose of this study is to determine if intraday week (IDW) effect of the currencies reflect leverage and asymmetric impact in currencies market. The study data set comprises of intraday patterns of 15 currencies from developed and emerging economies. Design methodology approach The study applies the exponential generalized autoregressive conditional heteroscedasticity (E-GARCH) model technique to observe the IDW leverage and asymmetric effect after introducing hourly dummies variables, namely, IDWmon, IDWwed, IDWfrid and IDWfrid-mon. Findings The study results favor the propositions and confirm that IDW effect do exist in the international forex markets in relation to hourly trading pattern for respective currencies. Mostly, currencies do depreciate on Monday and Wednesday compared to the rest of the days. However, on the last trading day, i.e. Friday currencies observe an appreciation pattern which is for both economies. The results have an evidence of leverage and asymmetric effect confirmed by the E-GARCH model as a result of press releases and influence by micro-factors in the currency markets. Practical implications The study believes to have theoretical connection related to the better understanding of currencies trend for developed and emerging economies, as the IDW effect exists. Moreover, confirmation of both the leverage and asymmetric effect in observed currencies would be able to assist the investors in making rational choices during the trading hours and would confirm considerable profits through profit incentivized strategies. Originality value The study not only add knowledge to the previous study work in relation to the hourly trading pattern of currencies with reference to the IDW effects but also highlights the leverage and asymmetric effect in currencies that will help in formulating future trading strategies particular to emerging economies.

Sustainable Manufacturing and Industry 4.0

2020 ◽  
pp. 21-64
Author(s):  
K. Lenin ◽  
Abdul Zubar Hameed ◽  
M. Fakkir Mohamed ◽  
Abdul Zubar Hameed ◽  
K. Lenin ◽  
...  
Keyword(s):  
Industry 4.0 ◽  
Sustainable Manufacturing
Sign in / Sign up

Export Citation Format

Share Document