Abstract
Many definitions for operations strategy appear in literature. Yet, after analysing some of these important definitions, there were some common denominators: planning and decision-making. It is through correct operations strategy planning and decisions that organizations achieve competitive edge, and for this reason, the subject is of major importance. In this paper we present a review on operations strategy (OS) in manufacturing, services and product-service organizations. Through the literature analysis we found several differences and fewer similarities between OS in manufacturing and services and also the positioning of product-service systems (PSS) OS, comparing to OS in manufacturing and in services. Our foremost contribution is providing a literature review and an analysis on the content of the OS frameworks.

Abstract
Product-service system (PSS) or particularly industrial product-service system (IPS2) is started to gain more attention as innovative strategy to face the competitive global market. Service aspect from IPS2 offering is believed could provide more values for customer than the standalone physical product. This new concept is not fully developed yet. There are some particular areas around IPS2 concept which are needed to be more explored and one of them is the cost dimension aspect. Cost is obviously important for company as basic information to support decision making process. Traditional costing system is no longer able to facilitate the company's transformation. The following work will present the analysis of current costing systems and a new assessment framework proposed to address the needs of IPS2 environment, particularly for IPS2 function-oriented business model. The proposed framework is developed based on the literature findings. Considering the specific characteristics of IPS2 business model, lean accounting is the best choice from current costing systems to be adjusted into the proposed framework. Lean accounting with its value stream costing (VSC) is able to provide comprehensive cost information to support company's long transformation journey towards a fully and successful IPS2 company. (C) 2015 The Authors. Published by Elsevier B.V.

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Lightweight ontologies are increasingly used by domain experts in a variety of activities. The development of these knowledge representation artefacts carries the challenge of the proper conceptualisation of the considered reality/situation. In particular, the elicitation of conceptual relations is widely acknowledged in the literature as being the most difficult part of the process. This paper proposes a technique to support domain experts in the elicitation of conceptual relations in the development of lightweight ontologies by providing the means to develop and ascertain the consistency of the produced conceptualisation results towards its reusability. Its innovation comes from the development of a reference model for the conceptual relations elicitation.