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Article
Publication date: 24 June 2021

Michael Perakis

The purpose of the paper is the construction of confidence intervals for the ratio of the values of process capability index Cpm for two processes. These confidence intervals can…

Abstract

Purpose

The purpose of the paper is the construction of confidence intervals for the ratio of the values of process capability index Cpm for two processes. These confidence intervals can be used for comparing the capability of any pair of competitive processes.

Design/methodology/approach

Two methods for constructing confidence intervals for the ratio of the values of process capability index Cpm for two processes are proposed. The suggested techniques are based on a two-step approximation of the doubly non-central F distribution. Their performance is tested via simulation.

Findings

The performance of the suggested techniques seems to be rather satisfactory even for small samples, as illustrated through the use of simulated data.

Practical implications

The practical implication of the suggested techniques is that they can be implemented in real-world applications, since they can be used for comparing the capability of any pair of competitive processes.

Originality/value

The paper presents two new methods for constructing confidence intervals for the ratio of the values of process capability index Cpm for two processes.

Details

International Journal of Quality & Reliability Management, vol. 39 no. 5
Type: Research Article
ISSN: 0265-671X

Keywords

Book part
Publication date: 4 December 2014

Hyun-Chan Kim, Alan Nicholson and Diana Kusumastuti

This study aims to identify the determinants of transport mode choice and the constraints on shifting freight in New Zealand (NZ) from road to rail and/or coastal shipping, and to…

Abstract

Purpose

This study aims to identify the determinants of transport mode choice and the constraints on shifting freight in New Zealand (NZ) from road to rail and/or coastal shipping, and to quantify the trade-off between factors affecting shippers’ perceptions, to assist in increasing the share of freight moved by non-road transport modes.

Methodology

A revealed preference survey of 183 freight shippers, including small and medium enterprises and freight agents in NZ, is used to investigate whether freight shippers’ characteristics affect their ranked preference for attributes related to mode choice and modal shift. Additionally, a rank-ordered logistic (ROL) model is estimated using the ranking data.

Findings

The results reveal several distinct types of transport mode choice behaviour within the sample and show how the preferences for timeliness, cost, accessibility, damage and loss, customer service, and suitability vary between industry groups and business types. Also, the ROL method allows us to identify heterogeneity in preferences for mode choice and mode shift factors for freight within NZ.

The results imply that NZ shippers ranked transport time as the most significant constraint upon distributing goods by rail, while accessibility and load size were the most significant constraints upon using coastal shipping. The study also identifies how NZ shippers’ modal shift constraints vary according to the firm’s individual or logistical characteristics.

Research implications

This study informs freight transport policy makers about the needs of NZ shippers by providing quantitative measures of the intensity of preference for the various mode choice factors.

Practical implications

Those involved in freight transport have a better basis for formulating transport policy.

Book part
Publication date: 12 January 2012

Alexandros M. Goulielmos, Venus Y. H. Lun and Kee-Hung Lai

To examine the EU ‘Short Sea Shipping’ (SSS), its ‘motorways of the sea (MoS)’ and green ports, within short sea maritime logistics.To present past research and report recent…

Abstract

To examine the EU ‘Short Sea Shipping’ (SSS), its ‘motorways of the sea (MoS)’ and green ports, within short sea maritime logistics.

To present past research and report recent developments speculating on future trends.

The dominance of SSS over road is questioned; as road transport has expanded, hubs are expected to become larger and fewer with feeders. Road transport is not certain to follow SSS and its four motorways. This result was responsible for the relocation of industry from West to East and North–East inter-port competition.

The SSS ship size and port are undefined; specific data on these concepts are unavailable.

‘Door-to-door’ services are highly sought after in this sector, but difficult to establish.

The green element introduced here, mainly for ports, will dominate future discussions because of the high importance given to climate change.

This chapter outlines for the first time the development of the policy on EU Eco-ports, the relocation of industry, the West–East port competition, the MoS and the long-term deterioration of SSS logistics which is likely to persist in the future.

Book part
Publication date: 14 September 2007

Abstract

Details

Handbook of Transport Modelling
Type: Book
ISBN: 978-0-08-045376-7

Article
Publication date: 27 December 2022

Abhishek Behl, Nirma Sadamali Jayawardena, Vijay Pereira and Brinda Sampat

This paper aims to assess the readiness of retail workers to use blockchain technology (BCT) to improve supply chain performance. The assessment was made via a quantitative…

Abstract

Purpose

This paper aims to assess the readiness of retail workers to use blockchain technology (BCT) to improve supply chain performance. The assessment was made via a quantitative approach taken using a theoretical framework based on Keller’s motivation model and self-determination theory in the BCT context.

Design/methodology/approach

The authors collected data from 567 retail workers from an emerging country through a structured survey questionnaire. The authors tested the hypotheses of the proposed model using Warp PLS 7.0 and controlled firm age, industry type and technological intensity.

Findings

Our findings may help firms in making the process of digital transformation inclusive. The authors found that supplier-based attention and motivation through BCT lead to supply chain performance, and that supplier-based satisfaction and trust achieved through BCT positively impact supply chain performance. Further, supplier-based relevance on raw material selection with the higher trust and motivation levels achieved through BCT was found to have a positive impact on supply chain performance.

Research limitations/implications

IT supply chain applications are referred to as “lean” rather than “rich” because they still rely mainly on written and numerical means to present data. When the environment is less ambiguous, then less rich media can be used to facilitate communication. IT supply chain applications allow suppliers to spend time building relationships with other suppliers instead of focusing on administrative tasks, thus enhancing such relationships.

Originality/value

This study can be considered the first to assess retailer readiness to use BCT to improve supply chain performance through the theoretical lens of Keller’s motivation model and self-determination theory.

Details

Journal of Enterprise Information Management, vol. 37 no. 2
Type: Research Article
ISSN: 1741-0398

Keywords

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