Problem Description
Stefan Queins
Gerhard Zimmermann
Martin Becker
Martin Kronenburg
Christian Peper
Rolf Merz
Jürgen Schäfer
(University of Kaiserslautern, Germany
{queins, zimmerma, mbecker, kronburg, peper}@informatik.uni-kl.de,
merz@eit.uni-kl.de)
Abstract: This document contains a range of needs and requirements concerning the construction of a light control system for a floor of a university building. A description of the building architecture and of some pre-installed (light-)hardware is included. This problem description was the common input for all participants of the requirements engineering case study "Light Control".
Key Words: requirements engineering, building automation, problem description
Introductory Note
This document gives an informal description of the problem "Light Control System", that is the subject of the considered case study. It is based on two previous versions that have been used in the Sonderforschungsbereich 501 "Development of Large Systems with Generic Methods", a large project at the Computer Science Department of the University of Kaiserslautern. The initial version was created in 1995 by Stefan Queins and Gerhard Zimmermann. The second version (reported in [Fe+99]) integrates several changes by Martin Becker and Martin Kronenburg. This version was also used in a Dagstuhl Seminar on "Requirements Capture, Documentation, and Validation" that took place in June 1999.
Finally, the version presented here is the result of repeated revisions by Martin Kronenburg and Christian Peper in agreement with Rolf Merz and Jürgen Schäfer from the Electrical Engineering Department of the University of Kaiserslautern, who were acting as customers in the light control case study (LCCS). Some additional improvements are based on input received from Daniel Berry, Vincenzo Gervasi, Julio Leite, and Vinicius da Silva Almendra.
Thus, the basic intention of providing a customer document as the basis for the case study has been preserved. The revisions were intended to reduce the need for customer feedback during the LCCS. Furthermore, to achieve solutions that are better comparable, all interactions between the customer and the participants of the case study have been published on the web [CF99].
The problem description "Light Control" is divided into 4 parts. [Part 1] is a brief introduction. [Part 2] describes the architecture of the 4th floor of a university building in Kaiserslautern, which is the subject of the informal needs given in [Part 3]. Finally, [Part 4] lists and explains technical terms that are used in the document.
| [Fe+99] | R. L. Feldmann, J. Münch, S. Queins, S. Vorwieger, G. Zimmermann: Baselining a Domain-Specific Software Development Process, Technical Report SFB501 TR-02/99, University of Kaiserslautern, 1999 |
| [CF99] | Customer Feedback of the LCCS, http://rn.informatik.uni-kl.de/ recs/ qna/,
University of Kaiserslautern, 1999 |
Part 1: Introduction
1 The main motivation for the development of a new light control system are the disadvantages of the currently existing system. Since all lights are controlled manually, electrical energy is wasted by lighting rooms which are not occupied and by little possibilities to adjust light sources relative to need and daylight.
2 In the following document, keywords are marked at their first occurrence and listed in the additional dictionary (Part 4).
3 Words written in emphasis are names of physical sensors/actuators.
4 Paragraphs are numbered for easier reference.