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Book part
Publication date: 6 September 2019

Vivian M. Evangelista and Rommel G. Regis

Machine learning methods have recently gained attention in business applications. We will explore the suitability of machine learning methods, particularly support vector…

Abstract

Machine learning methods have recently gained attention in business applications. We will explore the suitability of machine learning methods, particularly support vector regression (SVR) and radial basis function (RBF) approximation, in forecasting company sales. We compare the one-step-ahead forecast accuracy of these machine learning methods with traditional statistical forecasting techniques such as moving average (MA), exponential smoothing, and linear and quadratic trend regression on quarterly sales data of 43 Fortune 500 companies. Moreover, we implement an additive seasonal adjustment procedure on the quarterly sales data of 28 of the Fortune 500 companies whose time series exhibited seasonality, referred to as the seasonal group. Furthermore, we prove a mathematical property of this seasonal adjustment procedure that is useful in interpreting the resulting time series model. Our results show that the Gaussian form of a moving RBF model, with or without seasonal adjustment, is a promising method for forecasting company sales. In particular, the moving RBF-Gaussian model with seasonal adjustment yields generally better mean absolute percentage error (MAPE) values than the other methods on the sales data of 28 companies in the seasonal group. In addition, it is competitive with single exponential smoothing and better than the other methods on the sales data of the other 15 companies in the non-seasonal group.

Details

Advances in Business and Management Forecasting
Type: Book
ISBN: 978-1-78754-290-7

Keywords

Content available
Book part
Publication date: 6 September 2019

Abstract

Details

Advances in Business and Management Forecasting
Type: Book
ISBN: 978-1-78754-290-7

Book part
Publication date: 13 November 2008

Louis Kriesberg

The variety of the subjects examined in the preceding chapters reflects the vastness of the contemporary conflict resolution field. To discuss contexts that encompass them…

Abstract

The variety of the subjects examined in the preceding chapters reflects the vastness of the contemporary conflict resolution field. To discuss contexts that encompass them requires relying on basic conflict processes. I have chosen such processes related to three fundamental matters: (1) that conflicts are interlocked with each other, (2) that various kinds of inducements are used in conflicts, and (3) that how conflicts are waged and settled is related to conflict outcomes.

Details

Pushing the Boundaries: New Frontiersin Conflict Resolution and Collaboration
Type: Book
ISBN: 978-1-84855-290-6

Article
Publication date: 28 October 2021

Jagan S. and Neelakantan T.R.

Scarcity in the construction aggregates necessitated the use of suitable alternative materials such as recycled aggregates. However, the higher porosity of recycled…

Abstract

Purpose

Scarcity in the construction aggregates necessitated the use of suitable alternative materials such as recycled aggregates. However, the higher porosity of recycled aggregates due to the presence of adhered mortar affects its quality resulting in limited utilization. The purpose of this paper is to investigate the use of Bacillus subtilis to enhance the properties of the recycled coarse aggregate (RCA). The strains of the bacterial species were collected from the Gene bank, Chandigarh, and cultured to 105 cells/ml to treat the RCA.

Design/methodology/approach

The concrete mixtures are prepared with 0%, 50% and 100% of treated and untreated RCA by mortar mixing approach. The concrete specimens are tested for compressive strength, split tensile strength, flexural strength and elastic modulus at 7, 14 and 28 days, respectively.

Findings

Microbial treatment to RCAs increased the weight of the aggregate and decreased the water absorption of the aggregates. The optimal replacement of RCA was observed to be 50% and the strength of the concrete with 50% of treated RCA was comparable to the normal aggregate concrete. The CaCO3 precipitation by bacterial species fills the pores on the RCA and thus increasing the strength of the concrete.

Originality/value

The originality of the research is to produce concrete with waste recycled aggregate treated by bacteria to overcome the problem of scarcity in construction materials.

Details

World Journal of Engineering, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1708-5284

Keywords

Article
Publication date: 15 June 2010

Kaouther Kooli, Len Tiu Wright and Adrian Wright

Dependence on access to European markets through subcontracting relationships with European firms has exposed subcontracting clothing and textile producers in less…

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Abstract

Purpose

Dependence on access to European markets through subcontracting relationships with European firms has exposed subcontracting clothing and textile producers in less developed economies to the vagaries of international market competition. This paper aims to examine the problems that such exposure creates and the requirements for developing marketing activities through the concept of the alliance life cycle as a viable solution for a sample of Tunisian clothing and textile firms.

Design/methodology/approach

The inductive reasoning of this research was implemented through qualitative research based on a range of tools derived from a case study and a dual ethnographic approach.

Findings

The main results showed that life cycle stages of the subcontracting firms reflected Schumpeter's creation and destruction cycle of innovation. Therefore, subcontracting firms could learn from their activities with their business customers so that they developed marketing competences in innovative processes. The findings also demonstrated that some of the firms in the Tunisian clothing and textile industries were more successful than others.

Research limitations/implications

This research focused mainly on subcontracting alliances with implications for future study of other alliances for different industries.

Practical implications

The life cycle approach could be of great interest to subcontracting managers in the post Multi Fibre Arrangement era. This approach is relevant mainly for decision makers in providing them with a framework within which they might optimise their marketing strategies and their implementations.

Originality/value

The research originality resides in its Schumpeterian perspective in considering business‐to‐business relationships. The value of the paper is to focus on the evolutionary aspects of relationships between contractors and subcontractors and the patterns of the marketing development within these relationships.

Details

Journal of Business & Industrial Marketing, vol. 25 no. 5
Type: Research Article
ISSN: 0885-8624

Keywords

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