ANALISIS TINGKAT KEPUASAN PELANGGAN TERHADAP PENJUALAN AIR MINUM ISI ULANG DENGAN MENGGUNAKAN METODE ROUGH SET

Customer satisfaction in the sales of refill drinking water is an important thing. Given refill drinking water sales are increasing in every region. Today, people prefer to consume drinking water refill because more saving time and cost. Increased sales of refill drinking water also the result of difficult to get clean water for consumption. Sales of good drinking water is also based on the level of water cleanliness, quality service, price, and the charging time of the water. In this case, the authors do analysis on Drinking Water Depot Refill Water Rihata at Jl. Nirwana Huta VII, Village Purbasari, district. Buts Dolok, Kab. Simalungun. The analysis is using Rough Set. This method is expected to know customer satisfaction with the sale of refill drinking water. This analysis is expected can help you find the level of customer satisfaction on water sales drink refills. And from the result, this analysis can show gifts to the customer in accordance with the criteria of degree of satisfaction