The paper proposes a synthesis of several specific approaches of productivity in services, in order to provide a better argued theoretical basis for a realistic assessment of the values of several comparative indicators. From a conceptual point of view, the paper will take as a base some definitions of productivity as a quantitative and industrial indicator, revealing certain aspects that need a widening of the area of approach, in the purpose of being suitable for immaterial activities. Based on the brief analysis of productivity, performance and servicity indicators, the research establishes correlations between them in the immaterial field. Elder and, as well, most recent analyses found in the field literature are used, from most rigorous sources, and they are supplemented with own approaches; such approaches ore pointing out several most specific features that are specially set for services and intellect-intensive activities. Technical and financial aspects of common productivity are taken into account, as well as performance in realising various goals, non-economic here included, and the service components, in a complex approach. The presentation focus on nuance features in the quoted references, in the purpose of a fine defining of the indictors and approaches. Specific particularization is achieved based on the literature. Methodologically, the paper is approaching in an unorthodox manner, the plus of value issued from the human activity, i.e. being in a view coming from a fine analysis of the service performed by any economic activity, in a market system. The conceptual importance of these comparative indicators is concisely highlighted, and it consists mainly in the opening that can become a useful ground for practical applicative analyses, which actually are proposed in the future developments of the topic. The research results reveal the relationship between these comparative indicators as well as some conceptual differences between them. Their application can be made for material and immaterial economic activities, at different levels of economic entities concerned.
