Selection of electrical accessories: a cost modelling approach

Electrical installations contribute to 6% -10% of the total cost of a typical house. Therefore, the selection of the most appropriate electrical accessories is very important from the client’s point of view. But lack of information about the products and prices makes these decisions very difficult for clients to make. Development of a product-cost model for the selection of electrical accessories could be seen as one of the solutions for this problem. Thus the authors have developed a product-cost model for the selection of electrical accessories for housing constructions in Sri Lanka. A market survey and a series of interviews were conducted in order to collect cost and product data pertaining to electrical accessories used in Sri Lankan domestic electrical installations. All the accessories identified were classified into five main categories based on their functionality. In the data analysis, three main cost categories were identified. On the other hand, three different designs were selected to represent the collection of accessories in a typical domestic electrical installation. Finally, a simple decision support system was developed as the front end for the developed product-cost model.