Search results

1 – 10 of 16
Article
Publication date: 30 April 2024

Luigi Morfini, Fankai Meng, Margherita Beretta, Jozef Vleugels, Roberto Spina and Eleonora Ferraris

This study aims to investigate the performance of filament-based material extrusion additive manufacturing (MEX), combined with debinding and sintering, as a novel approach to…

Abstract

Purpose

This study aims to investigate the performance of filament-based material extrusion additive manufacturing (MEX), combined with debinding and sintering, as a novel approach to manufacturing ceramic components.

Design/methodology/approach

A commercial ZrO2 filament was selected and analysed by infra-red (IR) spectroscopy, rheology and thermo-gravimetry. The influence of the print parameters (layer thickness, flow rate multiplier, printing speed) and sintering cycle were investigated to define a suitable printing and sintering strategy. Biaxial flexure tests were applied on sintered discs realised with optimised printing strategies, and the results were analysed via Weibull statistics to evaluate the mechanical properties of printed components. The hardness and thermal conductivity of sintered components were also tested.

Findings

Layer thickness and flow rate multiplier of the printing process were proved to have significant effect on the density of as-printed parts. Optimised samples display a sintered density >99% of the theoretical density, 20% linear sintering shrinkage, a characteristic flexural strength of 871 MPa with a Weibull modulus of 4.9, a Vickers hardness of 12.90 ± 0.3 GPa and a thermal conductivity of 3.62 W/mK. Gyroids were printed for demonstration purposes.

Originality/value

To the best of the authors’ knowledge, this work is the first to apply biaxial flexure tests and Weibull statistics to additively manufactured MEX zirconia components, hence providing comparable results to other additive technologies. Moreover, fractography analysis builds the connection between printing defects and the fracture mechanism of bending. This study also provides guidelines for fabricating high-density zirconia components with MEX.

Details

Rapid Prototyping Journal, vol. 30 no. 5
Type: Research Article
ISSN: 1355-2546

Keywords

Book part
Publication date: 16 January 2023

David Coghlan and Abraham B. (Rami) Shani

A scholarly collaborative partnership is a capability that develops over time. Its quality is an outcome of the collaborative context, the alignment of purpose, development of…

Abstract

A scholarly collaborative partnership is a capability that develops over time. Its quality is an outcome of the collaborative context, the alignment of purpose, development of work and learning processes, development of shared language and success stories. In this chapter, the authors engage in a metalogue where their shared reflection on the formation and development of their collaborative scholarship in the field of organization development and change is itself an instance of a process of shared scholarship. By adopting the format of a metalogue, they provide the voices of their individual thinking and their reflective conversation so as to offer an expression of the process of theorizing to scholars who wish to embark upon or study shared scholarship.

Article
Publication date: 1 October 1997

Emilio Bartezzaghi, Gianluca Spina and Roberto Verganti

Many post‐Fordist experiences seem nowadays to converge on an emerging manufacturing paradigm that the authors have named strategically flexible production (SFP). The process of…

Abstract

Many post‐Fordist experiences seem nowadays to converge on an emerging manufacturing paradigm that the authors have named strategically flexible production (SFP). The process of diffusion and assimilation of SFP is influenced by extra‐firm factors and country‐specific conditions. Explores the role of regional infrastructures and services to support the adoption and running of manufacturing systems that are oriented to the SFP. Uses the case of Lombardy, one of the most industrialized regions in Europe, as the empirical field of investigation. Discusses ten cases studies in three industries ‐ electronic, textile and mechanical ‐ in order to identify the needs for extra‐firm infrastructures at the company level. In‐depth evidence provides insights on the demand for extra‐firm infrastructures and services induced by SFP and allows one to infer implications and guidelines for policy making. Concludes that SFP induces a selective demand for extra‐firm services and infrastructures.

Details

Integrated Manufacturing Systems, vol. 8 no. 5
Type: Research Article
ISSN: 0957-6061

Keywords

Article
Publication date: 1 December 2002

Gianluca Spina, Roberto Verganti and Giulio Zotteri

As customers ask for increasing levels of performance, functionality and customisation, firms rely on suppliers not only as a source of components, but also as a source of…

2020

Abstract

As customers ask for increasing levels of performance, functionality and customisation, firms rely on suppliers not only as a source of components, but also as a source of innovation. Several researchers have investigated the adoption of co‐design, its potential benefits and its costs. Recently, scholars have increasingly underlined the need for bringing this rich stream of studies within a contingency framework, taking into account context variables and internal characteristics of the firm. This paper contributes to this contingency theory of co‐design adoption. We investigate the role of three factors that might influence the intensity of supplier involvement in product development: structural characteristics (industry, size and degree of vertical integration), strategic priorities (strategic fit) and internal consistency with purchasing and new product development practices. An empirical analysis of 67 Italian manufacturers demonstrates that co‐design adoption is actually related to most of these factors.

Details

International Journal of Operations & Production Management, vol. 22 no. 12
Type: Research Article
ISSN: 0144-3577

Keywords

Article
Publication date: 1 May 1994

Emilio Bartezzaghi, Gianluca Spina and Roberto Verganti

In recent years, time‐based competition (TBC) has drawn the attention ofseveral practitioners and academicians. Much evidence has been putforward from case studies in order to…

3549

Abstract

In recent years, time‐based competition (TBC) has drawn the attention of several practitioners and academicians. Much evidence has been put forward from case studies in order to show the benefits that derive from time compression. Nevertheless, there is a lack of conceptual models and operating tools to support lead‐time reduction. Provides a conceptual framework for modelling the lead time of business processes in order to design effective re‐engineering. Two levels of lead‐time modelling have been identified: an aggregate level, which accounts for the relationships between lead times of different phases of a process, and a detailed one, which allows the mechanisms of lead‐time making to be clearly understood. Reviews existing time models and proposes two new detailed models in order to cope with the growing need for process re‐engineering. Presents these models in terms of time components and composition laws. Suggests a process taxonomy to select the suitable lead‐time models depending on the process characteristics at both the aggregate and detailed level. Finally, shows how detailed models could be used to link lead time to process performances on the one hand and to managerial levers on the other. Thirteen time‐drivers, affecting the lead time of a given process and its basic components, have been identified.

Details

International Journal of Operations & Production Management, vol. 14 no. 5
Type: Research Article
ISSN: 0144-3577

Keywords

Article
Publication date: 1 December 2001

Martha Zarate

Looks at the first 100 years of Italian cinema examining its role in Italy’s recent history. Provides a bibliography of major film directors, Italian cinema sources, reference…

2920

Abstract

Looks at the first 100 years of Italian cinema examining its role in Italy’s recent history. Provides a bibliography of major film directors, Italian cinema sources, reference works, histories, themes, theory and criticism and articles in journals.

Details

Collection Building, vol. 20 no. 4
Type: Research Article
ISSN: 0160-4953

Keywords

Article
Publication date: 1 September 1998

Raffaella Cagliano, Gianluca Spina, Roberto Verganti and Giulio Zotteri

Notes that supporting small to medium‐sized enterprises (SMEs) in their process towards the adoption of business process re‐engineering (BPR) may be essential as the tools and…

1326

Abstract

Notes that supporting small to medium‐sized enterprises (SMEs) in their process towards the adoption of business process re‐engineering (BPR) may be essential as the tools and methodologies of BPR were designed for larger companies. Presents a methodology for the design of support services, developed within the context of a European Union (EU) project. The methodology consists of four major steps. The first step consists of an analysis of users’ needs. Since BPR support needs are differentiated and often implicit, an “ad hoc” methodology was developed to make demand explicit and split the potential market into homogeneous segments. The second step identifies the proper services to meet the needs of SMEs. The third step explores current supply of services and the critical success factors of a BPR support centre. Finally, the fourth step defines guidelines for the design of both the support centre and the specific support services. The methodology was developed also on the basis of the case of the Lombard machinery industry. Finally, the paper discusses the transferability of the methodology to other regions and industries.

Details

International Journal of Operations & Production Management, vol. 18 no. 9/10
Type: Research Article
ISSN: 0144-3577

Keywords

Article
Publication date: 23 April 2020

Chiara Cimini, Albachiara Boffelli, Alexandra Lagorio, Matteo Kalchschmidt and Roberto Pinto

This article aims to investigate the organisational implications of adopting Industry 4.0 (I4.0) technologies, giving specific attention to operations. The paper addresses these…

6249

Abstract

Purpose

This article aims to investigate the organisational implications of adopting Industry 4.0 (I4.0) technologies, giving specific attention to operations. The paper addresses these implications in two directions: organisational prerequisites for, and consequences of, I4.0 technologies.

Design/methodology/approach

The research is based on a multiple case study of Italian small and medium enterprises (SMEs) in manufacturing. Ten case studies have been developed through interviews, company visits and secondary data collection.

Findings

The multiple case study results show that: (1) a lean organisational structure supports effective adoption of I4.0 technologies; (2) introducing such technologies is linked to developing a new kind of job profile (i.e. the “Autonomous Operative Job Profile”); and (3) higher levels of technology adoption create a higher need for non-technical competences.

Research limitations/implications

A limitation of this research relates to the highly heterogeneous maturity levels of the sampled companies, due to the relative newness of the I4.0 paradigm. Future research could, therefore, longitudinally analyse the technology integration process within organisations.

Practical implications

This research provides preliminary evidence about how organisations and technologies co-evolve, thus suggesting that managers should co-design these areas. It also demonstrates the extreme importance of designing a structured process and a clear set of human resource management tools to favour SME organisational development.

Originality/value

The study is built upon a conceptual framework derived from the sociotechnical perspective that analyses the interconnections between technology implementation and organisational change. From the results, three research propositions are derived to be tested on a larger scale.

Details

Journal of Manufacturing Technology Management, vol. 32 no. 3
Type: Research Article
ISSN: 1741-038X

Keywords

Content available
Article
Publication date: 21 August 2009

Nuran Acur and Chris Voss

1118

Abstract

Details

International Journal of Operations & Production Management, vol. 29 no. 9
Type: Research Article
ISSN: 0144-3577

Article
Publication date: 1 July 1998

Alberto De Toni and Roberto Filippini

Reports on the current operations management situation in Italy. Includes a brief historical review looking back to the 1950s. Considers the development of research and education…

3119

Abstract

Reports on the current operations management situation in Italy. Includes a brief historical review looking back to the 1950s. Considers the development of research and education in the field since the 1980s. Gives listings of key institutions, personnel and events relating to operations management in Italy.

Details

International Journal of Operations & Production Management, vol. 18 no. 7
Type: Research Article
ISSN: 0144-3577

Keywords

1 – 10 of 16