Additive manufacturing applied to injection moulding: technical and economic impact

2019 ◽  
Vol 25 (7) ◽  
pp. 1241-1249 ◽  
Author(s):  
Joel Vasco ◽  
F.M. Barreiros ◽  
Andreia Nabais ◽  
Nilza Reis
Keyword(s):  
Economic Impact ◽  
Cycle Time ◽  
Injection Moulding ◽  
Energy Savings ◽  
Small Scale ◽  
Scale Production ◽  
Conformal Cooling ◽  
Content Type ◽  
Systematic Methodology

Purpose The purpose of this study is to compare the overall performance of the injection moulding process by using metallic inserts produced by both conventional technologies and selective laser melting (SLM). Design/methodology/approach A systematic methodology is proposed for prior evaluation of the effectiveness of conformal cooling channels to reduce cycle time and/or to reduce the scrap rate. Findings The mould was reengineered considering the SLM process and manufactured. Injection trials were carried out to validate expectations provided by injection simulations, which resulted on good quality parts and a significant decrease on cooling time, and, consequently, on the overall cycle time. The minimisation of scrap provided energy savings and time-to-market reduction. Research limitations/implications The initial costs for AM tools still pose some doubts on decision-makers. The challenge of this study is to implement the methodology on a small-scale production and still ensure that benefits are achieved. Practical implications The case study selected for this research work is based on a parking sensor housing, which is a plastic part assembled on the vehicle’s front and rear bumpers, therefore, with aesthetics concerns. The part produced with the conventional mould exhibits surface defects that, to be minimised (not eliminated), require a longer packing time to diminish the sink marks. Social implications The economic impact of the use of SLM is relevant despite the low batch size for the case study presented. Energy savings are achieved due to scrap reduction and shorter cycle time. Originality/value The systematic methodology proposed for prior evaluation of the advantages of conformal cooling is possible to be applied both on small scale and high production series.

scholarly journals Explaining participation in undeclared work in France: lessons for policy evaluation

2017 ◽  
Vol 37 (3/4) ◽  
pp. 203-217 ◽  
Author(s):  
Jan Windebank ◽  
Ioana Alexandra Horodnic
Keyword(s):  
Policy Framework ◽  
Small Scale ◽  
French Population ◽  
The European Union ◽  
Social Actor ◽  
Tax Morale ◽  
Content Type ◽  
Economic Actor ◽  
Undeclared Work

Purpose France is a model of best practice in the European Union as regards policy to combat undeclared work. The purpose of this paper is to take the country as a case study to evaluate the competing explanations of why people engage in undeclared work which underpin such policy, namely, the dominant rational-economic-actor approach and the more recent social-actor approach. Design/methodology/approach To evaluate these approaches, the results of 1,027 interviews undertaken in 2013 with a representative sample of the French population are analysed. Findings The finding is that higher perceived penalties and risks of detection have no significant impact on the likelihood of conducting undeclared work in France. In contrast, the level of tax morale has a significant impact on engagement in the activity: the higher the tax morale, the lower is the likelihood of participation in the undeclared economy. Higher penalties and risks of detection only decrease the likelihood of participation in undeclared work amongst the small minority of the French population with very low tax morale. Practical implications Current policy in France to counter undeclared work is informed principally by the rational-economic-actor approach based on a highly developed infrastructure for detection and significant penalties alongside incentives to declare small-scale own-account work. The present analysis suggests that this approach needs to be supplemented with measures to improve citizens’ commitment to compliance by enhancing tax morale. Originality/value This case study of a country with a well-developed policy framework to combat undeclared work provides evidence to support the social-actor approach for informing policy change.

On the dependability of highly critical non-recoverable space entities with short operation life. Case study of single-use mechanical devices

Dependability ◽  
2021 ◽  
Vol 21 (3) ◽  
pp. 3-12
Author(s):  
Yu. P. Pokhabov
Keyword(s):  
Process Engineering ◽  
Small Scale ◽  
Design Engineering ◽  
Scale Production ◽  
Decimal Point ◽  
Engineering Analysis ◽  
Single Use ◽  
Mechanical Devices ◽  
Verification Techniques

Aim. To consider matters of dependability of highly critical non-recoverable space products with short operation life, whose failures are primarily caused by design and process engineering errors, manufacturing defects in the course of single-unit or small-scale production, as well as to define the methodological approach to ensuring the required reliability.Methods. Options were analysed for improving the dependability of entities with short operation life using the case study of single-use mechanical devices and the statistical approaches of the modern dependability theory, special methods of dependability of actuated mechanical assemblies, FMEA, Stage-Gate and ground experiments on single workout equivalents for each type of effect. Results. It was concluded that additional procedures need to be conducted for the purpose of predicting, mitigation and (or) eliminating possible failures as part of the design process using exactly the same approaches that cause failures, i.e., those of design and process engineering. The engineering approaches to dependability are based on early identification of possible causes of failures, which requires a qualified and systemic analysis aimed at identifying the functionality, performance and dependability of an entity, taking into account critical output parameters and probabilistic indicators that affect the performance of the required functions with the allowable probability of failure. The solution is found using a generalized parametric model of operation and design engineering analysis of dependability.Conclusion. For highly critical non-recoverable space entities with short operation life, the reliability requirements should be considered primarily in terms financial, economic, safetyrelated and reputational risks associated with the loss of spacecraft. From a design engineer’s standpoint, the number of nines after the decimal point (rounded to a smaller number of nines for increased confidence) should be seen as the indicator for the application of the appropriate approaches to ensuring the required reliability at the stage of product design. In case of two nines after the decimal point it is quite acceptable to use analytical and experimental verification techniques common to the aerospace industry, i.e., dependability calculations using the statistical methods of the modern dependability theory and performance indicators, FMEA and Stage-Gate, ground experiments on single workout equivalents for each type of effect. As the required number of nines grows, it is advisable to also use early failure prevention methods, one of which is the design engineering analysis of dependability that enables designers to adopt substantiated design solutions on the basis of engineering disciplines and design and process engineering methods of ensuring quality and dependability. The choice of either of the above dependability strategies is determined solely by the developer’s awareness and understanding of potential hazards, which allows managing the risk of potential rare failures or reasonably refusing to do so.

scholarly journals Supply chain resilience in a developing country context: a case study on the interconnectedness of threats, strategies and outcomes

2017 ◽  
Vol 22 (6) ◽  
pp. 486-505 ◽  
Author(s):  
Benjamin Tukamuhabwa ◽  
Mark Stevenson ◽  
Jerry Busby
Keyword(s):  
Supply Chain ◽  
Developing Country ◽  
Large Scale ◽  
Empirical Studies ◽  
Small Scale ◽  
Supply Network ◽  
Catastrophic Events ◽  
Content Type ◽  
Supply Chain Resilience

Purpose In few prior empirical studies on supply chain resilience (SCRES), the focus has been on the developed world. Yet, organisations in developing countries constitute a significant part of global supply chains and have also experienced the disastrous effects of supply chain failures. The purpose of this paper is therefore to empirically investigate SCRES in a developing country context and to show that this also provides theoretical insights into the nature of what is meant by resilience. Design/methodology/approach Using a case study approach, a supply network of 20 manufacturing firms in Uganda is analysed based on a total of 45 interviews. Findings The perceived threats to SCRES in this context are mainly small-scale, chronic disruptive events rather than discrete, large-scale catastrophic events typically emphasised in the literature. The data reveal how threats of disruption, resilience strategies and outcomes are inter-related in complex, coupled and non-linear ways. These interrelationships are explained by the political, cultural and territorial embeddedness of the supply network in a developing country. Further, this embeddedness contributes to the phenomenon of supply chain risk migration, whereby an attempt to mitigate one threat produces another threat and/or shifts the threat to another point in the supply network. Practical implications Managers should be aware, for example, of potential risk migration from one threat to another when crafting strategies to build SCRES. Equally, the potential for risk migration across the supply network means managers should look at the supply chain holistically because actors along the chain are so interconnected. Originality/value The paper goes beyond the extant literature by highlighting how SCRES is not only about responding to specific, isolated threats but about the continuous management of risk migration. It demonstrates that resilience requires both an understanding of the interconnectedness of threats, strategies and outcomes and an understanding of the embeddedness of the supply network. Finally, this study’s focus on the context of a developing country reveals that resilience should be equally concerned both with smaller in scale, chronic disruptions and with occasional, large-scale catastrophic events.

scholarly journals Inclusive school practices supporting the primary to secondary transition for autistic children: pupil, teacher, and parental perspectives

2018 ◽  
Vol 4 (4) ◽  
pp. 184-196 ◽  
Author(s):  
Keri Hoy ◽  
Sarah Parsons ◽  
Hanna Kovshoff
Keyword(s):  
Young People ◽  
Secondary School ◽  
School Transition ◽  
Effective Practices ◽  
Small Scale ◽  
Autistic Children ◽  
Content Type ◽  
Secondary School Transition ◽  
Practical Implications

Purpose The primary to secondary school transition can have a significant and long-lasting impact on young people. Autistic children are particularly vulnerable to negative transition experiences; however, there is a lack of research examining effective practices and provision for these pupils. This case study involves a mainstream secondary school in the South of England, which has a dedicated Learning Support base. The purpose of this paper is to collect qualitative data on experiences of the primary to secondary school transition from multiple stakeholders. Design/methodology/approach A photovoice activity followed by a semi-structured interview was conducted with five autistic pupils aged 12–16 years; semi-structured interviews were also carried out with six parents and four teachers. Findings Five key themes emerged from the data in relation to effective practices: inclusion, child-centred approach, familiarisation, visual supports and communication and consistency. Research limitations/implications As a small-scale case study, there are limitations regarding generalisation. However, this research illuminates transition practices that are experienced as effective by autistic children, their families and teachers. Practical implications Practical implications related to each of these themes are highlighted. These implications are important in the context of the mandatory responsibilities of schools in England to include the voices of children and young people with special educational needs in decisions about their education. Originality/value The findings challenge a rights-based approach to inclusion and illustrate the importance of a needs-based approach which appropriately recognises and understands what autism means for children, their families and the teachers who support them.

SMED for quick changeover in manufacturing industry – a case study

2018 ◽  
Vol 25 (7) ◽  
pp. 2065-2088 ◽  
Author(s):  
Jagdeep Singh ◽  
Harwinder Singh ◽  
Inderdeep Singh
Keyword(s):  
Manufacturing Industry ◽  
Setup Time ◽  
Industrial Engineering ◽  
Small Scale ◽  
Small Enterprises ◽  
Production Environment ◽  
Content Type ◽  
Northern India ◽  
Manufacturing Environments

Purpose The purpose of this paper is to uncover the significance of SMED in manufacturing environments. Design/methodology/approach The paper gives setup instructions and guidelines to prepare the standardized setup procedure without ignoring actual constraints in production environment. It uses a case study in a small-scale manufacturing unit of northern India to generate an integrated setup reduction approach, utilizing Single Minute Exchange of Die (SMED)-based industrial engineering tools to achieve faster setups. It describes the feasibility of quick changeovers in small enterprises based on an “SMED” approach. Finally, the paper carries out empirical analysis of the financial/non-financial benefits incurred from setup reductions. Findings Setup activities are a vital part of the production lead time of any product and so affect overall product cost. Industrial engineering techniques have been used to analyze the existing procedure of setups. A SMED approach can help eliminate unwanted activities, externalize the internal activities, if possible, and reduce them by simplification or standardization. Originality/value The paper demonstrates the practical application of SMED showing how it can bring real breakthroughs in reducing setup time in small-scale manufacturing.

Reducing failure rate at high voltage (HV) testing of insulator using Six Sigma methodology

2018 ◽  
Vol 67 (5) ◽  
pp. 791-808 ◽  
Author(s):  
Darshak A. Desai ◽  
Aurangzeb Javed Ahmed Shaikh
Keyword(s):  
Failure Rate ◽  
High Voltage ◽  
Six Sigma ◽  
Manufacturing Industry ◽  
Small Scale ◽  
Case Study Methodology ◽  
Content Type ◽  
Sigma Level ◽  
Ceramic Manufacturing

PurposeThis paper, a case study, aims to illustrate the application of Six Sigma in a small-scale ceramic manufacturing industry. The purpose of this paper is to demonstrate the empirical application of DMAIC methodology to reduce failure rate at high voltage (HV) testing of one of the most critical products, insulator.Design/methodology/approachThe case study is based on primary data collected from a real-life situation prevailing in the industry. The case study methodology adopted here is at one small-scale unit wherein the authors have applied DMAIC methodology and observed and recorded the improvement results, especially, reduction in failure rate at HV testing of insulator and, thus, increase in Sigma level.FindingsThe results found after implementation of the solutions are very significant. The rejection percentage has been reduced from 0.5 to 0.1 percent and consequently the Sigma level has been improved from 4.4 to 5.0.Research limitations/implicationsThis success story can be a guiding roadmap for other such industries to successfully implement Six Sigma to improve quality, productivity and profitability.Practical implicationsThis case study will serve as one of the resource bases for the industries which have till not implemented Six Sigma and benefited from the same.Social implicationsImproved quality and productivity leads to better economy. This case will help industries to serve the society with better economy with improved quality and productivity.Originality/valueThough ceramic industries in India are having enormous potential for growth, majority of them, especially, small and medium industries are either not aware of or not implementing Six Sigma to reap its multidimensional benefits of improving quality, productivity and profitability. This study highlights the benefits reaped by small-scale ceramic manufacturing industry opening up the avenues for its application at other such organizations.

scholarly journals Collaborative configurations of tourism development: a Greenlandic example

2019 ◽  
Vol 6 (1) ◽  
pp. 24-39
Author(s):  
Daniela Chimirri
Keyword(s):  
Design Methodology ◽  
Local Community ◽  
Tourism Development ◽  
Essential Element ◽  
Small Scale ◽  
Research Approach ◽  
Content Type ◽  
Study Approach ◽  
Collaborative Activities

Purpose While tourism scholars have increasingly recognized the significance of collaboration as an essential element in tourism development, there is a lack of theoretical and empirical research centering on (trans)local collaboration as a central means for future tourism development in Greenland. The purpose of this paper is to analyze the conceptual and analytic potentials and challenges of collaboration in an explorative case study. Design/methodology/approach The paper applies a case study approach to scrutinize collaboration in the setting of a tourism workshop in South Greenland. This research approach is exploratory in nature and focuses on collaborative activities among participants from different research institutions and countries, from Campus Kujalleq in Qaqortoq, from small-scale enterprises and businesses, managers of destination marketing organizations and local fishermen. Findings Four “collaborative configurations” emerged during the workshop. These inspire and challenge ways of (re)conceptualizing collaborative tourism development in South Greenland and call for the reconsideration of the present approach toward tourism development for shaping new possible future(s) of tourism in the Greenlandic context. Originality/value The relevance of this paper emerges from the crucial significance that tourism actors in Greenland credit collaboration. Moreover, by approaching development issues from within and mutually developing possible practice solutions through collaboration with local tourism actors, the paper aims to give voice to the local community, which currently is lacking in the debate on tourism development in Greenland.

A critical evaluation of integrated care: a case study of the supported discharge service

2019 ◽  
Vol 27 (2) ◽  
pp. 141-152 ◽  
Author(s):  
Rachel Louise Ware
Keyword(s):  
Patient Satisfaction ◽  
Integrated Care ◽  
Patient Outcomes ◽  
Small Sample Size ◽  
Critical Evaluation ◽  
Small Sample ◽  
Small Scale ◽  
Discharge Process ◽  
Content Type

Purpose The purpose of this paper is to evaluate the Supported Discharge Service as a case study of integrated care. The paper will critically evaluate integrated care with regard to patient outcomes, patient satisfaction and cost and productivity. Design/methodology/approach A retrospective mixed methods case study design was adopted utilising patient satisfaction questionnaires, therapy outcome measure and a performance dashboard to measure improvements in patient satisfaction, patient outcomes and cost and productivity. Findings Measured improvements were observed in the integrated discharge process and analysis of the findings demonstrated a statistically significant improvement in patient outcomes, high levels of patient satisfaction and improved productivity subsequently leading to financial savings. Research limitations/implications Due to convenience sampling, the small sample size and a short time frame when analysing patient outcomes, the generalisability of results is limited. Despite this, with integrated care being polymorphous the findings can be utilised to develop theoretical principles to make assertions about integration (Wikfeldt, 1993). Originality/value This paper draws on the importance of integration as the principal driver of reform within the healthcare system. Even though on a small scale, the case study provides evidence to support the use of integration to improve patient outcomes, patient satisfaction and financial savings.

An application of 5S concept to organize the workplace at a scientific instruments manufacturing company

2015 ◽  
Vol 6 (1) ◽  
pp. 73-88 ◽  
Author(s):  
Shaman Gupta ◽  
Sanjiv Kumar Jain
Keyword(s):  
Design Methodology ◽  
Shop Floor ◽  
Small Scale ◽  
Content Type ◽  
Audit Score ◽  
Manufacturing Organization ◽  
Practical Implications ◽  
Cause And Effect Diagram ◽  
Collection Methods

Purpose – The purpose of this paper is to use the 5S tool to assist a small-scale manufacturing organization to become more productive and more efficient. Design/methodology/approach – A simple approach has been adopted to create the teams for implementing 5S. Cause-and-effect diagram has been studied for shop floor analysis. Later, four data collection methods have been used to ensure right implementation of the 5S. Findings – In the frames of this case study, it has been analyzed that implementation of “5S” resulted in overall improvement of the organization. With the implementation of “5S”, major benefits in the form of tool searching time have been achieved. Tool searching time from shop floor has been reduced from 30 minutes to 5 minutes. “5S” audit has been conducted in the organization. “5S” audit score has been increased from 7 (Week 1) to 55 (Week 20). Practical implications – 5S is a powerful tool and can be implemented in various industries whether micro, small, medium or large. Implementation of 5S has large horizontal development and can be implemented in all the workstations of an organization. Originality/value – The publications and case study presented in this paper will be useful to researchers, professionals and others concerned with this subject to understand the significance of 5S.

scholarly journals Kaizen Selection for Continuous Improvement through VSM-Fuzzy-TOPSIS in Small-Scale Enterprises: An Indian Case Study

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Sunil Kumar ◽  
Ashwani Kumar Dhingra ◽  
Bhim Singh
Keyword(s):  
Continuous Improvement ◽  
Cycle Time ◽  
Fuzzy Topsis ◽  
Shop Floor ◽  
Small Scale ◽  
Market Demand ◽  
Current State ◽  
Future State ◽  
Indian Industries

In the era of cut throat competitive market, Indian industries are under tremendous pressure to continuously reduce the cost and improve product quality. The main objective of this research paper is to provide a road map for investigating the opportunities to reduce cost and improve productivity and quality in the existing production system through the application of Lean-Kaizen concept using value stream mapping (VSM) tool at shop floor of an Indian Small-Scale Enterprise (SSE). On the basis of collected data from the selected industry, a current state map was made. After analysis, the current state map was modified to develop a future state map. By comparing current and future state map, the gap areas were identified and takt time (TT) was calculated considering actual market demand. To overcome the gap between current state map and future state map and to synchronize cycle time of each station with talk time, Kaizen event (KE) was proposed. Fuzzy technology for order preference by similarity to ideal solution (TOPSIS) was applied to prioritize and select the appropriate KE for optimized performance level. After analysis of data obtained after application of the Lean-Kaizen concept, the final improvements in terms of improved productivity (57.15%) and reduced lead time (69.47%), reduced cost (65.61%), and station cycle time (75.25%) were recorded. Through the case study drawn from realistic situations of the industry, the authors highlight that implementation of Lean-Kaizen using VSM and fuzzy TOPSIS provides improvement opportunities across the organization. The findings can inspire the SSEs to adopt the Lean-Kaizen concept for optimizing continuous improvement opportunities in their production industry. This study offers the researchers and practitioners a good example for understanding, selecting, and performing KE program. They can even attain more improvement in various areas by establishing or improving these KE programs.

Sign in / Sign up

Export Citation Format

Share Document