ABSTRAK
Penelitian ini bertujuan untuk mengatasi permasalahan operasional pada Toko Mebel Aden Safira Jepara yang masih menerapkan sistem penjualan konvensional, keterbatasan media promosi, pengolahan data yang masih manual, serta proses transaksi yang kurang efisien. Kajian pustaka dalam penelitian ini meliputi teori e-commerce, sistem informasi, perancangan antarmuka pengguna, serta metode pengembangan perangkat lunak Waterfall sebagai landasan dalam pengembangan sistem. Metode penelitian yang digunakan adalah rekayasa perangkat lunak dengan model Waterfall yang mencakup tahapan analisis kebutuhan, perancangan sistem, implementasi, dan pengujian. Metode pengumpulan data dilakukan melalui observasi, wawancara, dan studi pustaka untuk memperoleh kebutuhan fungsional
dan nonfungsional sistem. Hasil penelitian berupa sistem e-commerce berbasis web dengan model Business to Consumer (B2C) dengan fitur pengelolaan produk, katalog online, keranjang belanja, wishlist, checkout, pembayaran otomatis,
pengelolaan pesanan, perhitungan ongkos kirim otomatis, ulasan produk, serta laporan penjualan. Hasil pengujian Black Box dan White Box menunjukkan seluruh fungsi sistem berjalan sesuai dengan spesifikasi, sedangkan User Acceptance Test (UAT) memperoleh nilai penerimaan sebesar 89,41% dengan kategori sangat layak. Dengan demikian, penerapan sistem e-commerce berbasis web terbukti mampu meningkatkan efisiensi operasional, memperluas jangkauan pemasaran, serta mendukung peningkatan penjualan pada Toko Mebel Aden Safira Jepara.

Kata kunci: E-commerce, Sistem Informasi, Waterfall, Penjualan

ABSTRACT
This study aims to address operational problems at Aden Safira Jepara Furniture Store, which still relies on conventional sales systems, has limited promotional media, uses manual data processing, and experiences inefficient transaction
processes. The literature review in this study covers e-commerce theory, information systems, user interface design, and the Waterfall software development method as the foundation for system development. The research method employed is software engineering using the Waterfall model, which includes the stages of requirements analysis, system design, implementation, and testing. Data collection methods are conducted through observation, interviews, and literature studies to obtain the functional and non-functional requirements of the system.The result of this research is a web-based e-commerce system using a Business to Consumer (B2C) model, featuring product management, online catalogs, shopping carts, wishlists, checkout, automated payments, order management, automatic shipping cost calculation, product reviews, and sales reports. The results of Black Box and White Box testing indicate that all system functions operate according to specifications, while the result of User Acceptance Test (UAT) is 89.41%, categorized as highly feasible. Therefore, the implementation of the web-based e
commerce system has proven to improve operational efficiency, expand marketing reach, and support increased sales at Aden Safira Jepara Furniture Store.

Keywords: E-commerce, Information System, Waterfall, Sales