Customers and contractors

Integrating Quality, Environment, Health and Safety Systems with Customers and Contractors

The value of integrated management systems has been underlined in recent years by the development of a set of aligned ISO management standards for quality, environment and health and safety. The history of implementing an integrated management system aligned to these standards within Amec Process & Energy,* an offshore services contractor, is discussed in this paper with particular reference to...

Contractors for flows

We answer a question raised by Lovász and B. Szegedy [Contractors and connectors in graph algebras, J. Graph Theory 60:1 (2009)] asking for a contractor for the graph parameter counting the number of B-flows of a graph, where B is a subset of a finite Abelian group closed under inverses. We prove our main result using the duality between flows and tensions and finite Fourier analysis.

Contractors and connectors of graph algebras

We study generalizations of the “contraction-deletion” relation of the Tutte polynomial, and other similar simple operations, to other graph parameters. The question can be set in the framework of graph algebras introduced by Freedman, Lovász and Schrijver in [2], and it relates to their behavior under basic graph operations like contraction and subdivision. Graph algebras were introduced in [2...

Roadmaster Roading Contractors Case Study

Systems analysis students seldom experience the practical difficulties of the initial investigation into a client’s requirements. They get little chance to practice the skills they need to investigate complex and confused problem situations, or to appreciate the wider organisational issues that can impact on a situation. This teaching case is designed to give students the opportunity to practic...

Results of a Survey of KnowBe4 Customers and Non-Customers