Beniing.co merupakan salah satu Toko penyedia jasa layanan yang bergerak di bidang penjualan Fashion Wanita. Toko Beniing.co yang Beralamat di wilayah jalan raya kasab, yang melayani Berbagai jenis Fashion Wanita. Pihak Beniing.co
menyatakan bahwa persaingan Toko fashion Wanita di wilayah kecamatan Mandirancan sangat ketat, maka dari itu ingin diketahui berapa banyak Tingkat Kepuasan Terhadap Pelanggan Toko Beniing.co. demi memperoleh jumlah
pelanggan semaksimal mungkin. Oleh karena itu untuk meningkatkan kepuasan pelanggan dibutuhkan sebuah sistem yang mendukung strategi pemasaran produk dan mengetahui Tingkat kepuasan pelanggan kepada pelanggan guna memberikan pelayanan yang lebih mudah dengan menggunakan metode CRM Analisis dan Forecasting jenis Least Square. Sistem dibangun dengan menggunakan metode Waterfall, model perancangan Flowmap, Diagram Konteks, Data Flow Diagram (DFD) dan Entity Relationship Diagram (ERD). Hasil rancangan diimplementasikan ke dalam program PHP dan Code Igniter sehingga menghasilkan sistem penjualan yang mengimplementasikan peramalan utntuk
menentukan kepuasan pelanggan. Sistem yang dibangun membantu pihak Beniing.co dalam pengelolaan data-data, peramalan, dan pengambilan keputusan. Hal ini dibuktikan dengan rata-rata rating kepuasan berada di angka 5 dan hasil
interpretasi prediksi kepuasan pelanggan menunjukkan Interpretasi 32%, yang artinya pelanggan puas terhadap pelayanan dan pengalaman berbelanja di beniing.co.
Kata Kunci: CRM Analisis, Data Flow Diagram (DFD), Forecasting, Least Square.

Beniing.co is one of the service providers engaged in the sale of women's fashion. Beniing.co Store is located on Jalan Raya Kasab, which serves various types of women's fashion. Beniing.co stated that the competition of women's fashion
stores in the Mandirancan sub-district is very tight; therefore, it is necessary to know how much the level of customers’ satisfaction is for the Beniing.co store in order to obtain the maximum number of customers. Therefore, to increase
customers’ satisfaction, a system is needed that supports product marketing strategies and determines the level of customer satisfaction to customers in order to provide easier service using the Analytical CRM and Forecasting method of the least square type. The system is built using the Waterfall method and the Flowmap design model, context diagram, data flow diagram (DFD), and entity relationship diagram (ERD). The design results are implemented into the PHP and Code Igniter programs to produce a sales system that implements forecasting to determine customers’ satisfaction. The system built helps Beniing.co managing data,forecasting, and decision-making. This is proven by the average satisfaction rating at 5, and the results of the customers’ satisfaction prediction interpretation shows an interpretation of 32%, which means that customers are satisfied with the service and shopping experience at Beniing.co.
Keywords: CRM Analysis, Data Flow Diagram (DFD), Forecasting, Least Square.