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Although software process proposals appear continuously, it is difficult to fit any of them into a given company as they are. Thus, some kind of adaptation or tailoring is always necessary. The goal of software process tailoring is to adapt an "off-the-shelf" software process to meet the needs of a specific organization or project. Although process tailoring is a mandatory activity in most software process proposals, it is usually carried out by following an ad-hoc approach, and the amount of research done on this topic to date can be considered small. This paper presents a systematic review of software process tailoring, analyzing the existing approaches towards this activity, discussing the main issues related to the problem, and providing an up-to-date and complete framework in which to position new research activities.

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Abstract. In Geographic Information Systems (GIS) the attributes of the space (altitude, temperature, etc.) are usually represented using a raster model. There are no compact representations of raster data that provide efficient query capabilities. In this paper we propose compact representations to efficiently store and query raster datasets in main memory. We experimentally compare our proposals with traditional storage mechanisms for raster data, showing that our structures obtain competitive space performance while efficiently answering range queries involving the values stored in the raster.

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