Salah satu kekayaan Kota Langsa adalah hutan mangrove  yang berlokasi di Desa Kuala langsa Kecamatan Langsa Barat Kota Langsa. Jeruju (Acanthus ilicifolius) merupakan tumbuhan yang tumbuh di daerah mangrove . Daun jeruju bisa dimanfaatkan sebagai bahan makanan. Di Desa Kuala Langsa daun jeruju dimanfaatkan sebagai bahan pembuatan kerupuk. Kendala yang dihadapi oleh pelaku usaha adalah ketidakstabilan bahan baku dan harga jual yang tinggi dibandingkan harga camilan sejenisnya. Analisis value chain adalah suatu konsep yang mampu menciptakan keunggulan bersaing melalui integrasi aktivitas yang mempunyai nilai dalam perusahaan. Penelitian ini bertujuan meningkatkan daya saing pelaku usaha melalui analisis value chain. Adapun tahapan penelitian ini adalah mengidentifikasi risiko, menentukan prioritas masalah yang terjadi, menentukan tindakan peluang perbaikan, perhitungan analisis finansial melalui value chain analysis, merancang model value chain. Hasil yang diperoleh dalam penelitian ini adalah tindakan perbaikan pada supplier, manufacturer dan Distributor mampu meningkatkan keuntungan pelaku usaha dari 78% menjadi 88%.

CV Athaya Mineral is an industry that runs its business in the production and distribution of bottled drinking water. At the time of distribution of its products, errors often occur, namely the interpretation of demand data in each distribution chain and information received. The purpose of this study was to determine the optimal lotting technique for the distribution of these products using the Distribution Requirement Planning (DRP) method. From the results of data processing, the retail value of Kede Osa was obtained with a total cost of Rp. 233.696, New Store retail with an amount of Rp. 417,336, retail Ari JP Rp. 99,727, Simpang Remi retail Rp. 165,140, retail Mita Jaya Rp. 619,981. The conclusion of this study is the distribution of the Distribution Requirement Planning method for all Dance products (Glass, Small Bottles, Medium Bottles, and Gallons) to five retailers (Kede Osa, Toko Baru, Ari JP, Simpang Remi, and Mita Jaya) using Economic Order Quantity (EOQ) is a lotting technique with the cheapest distribution costs, except for New Store retailers using the Lot For Lot (LFL) lotting technique.

Brandan Donuts is a business that is engaged in the culinary field, especially delicious and healthy snacks, namely donuts. UD Brandan Donuts was founded by Jumardani, on September 1, 2015, at Jalan Sisingamangaraja, Simpang Limun, Medan City. The problem with UD Brandan Donuts is that the ordering and marketing system still relies on media for direct interaction with consumers (buyers) which makes it difficult for the management to expand market share. The purpose of this research is to build an order information system using the DFD method and apply the design of an online ordering information system at UD Brandan Donuts (WEB). The research uses the data flow diagram (DFD) method to design the system flow and uses the implementation of a software program, Xampp in designing a website (WEB). The results on the website design there are 2 levels that will run in ordering donuts online, namely Level 1 consisting of the buyer login process, ordering, delivery, admin login, financial reports. And level 2 consists of the process of registering a buyer's account, logging in, selecting a donut product, filling in order data, selecting the type of transaction, payment, confirmation of order completion, delivery schedule, order confirmation until, input of donut category, input of donut stock, confirmation of order data, confirmation payment, promotion, daily report processing, monthly report processing, and annual report processing. The conclusion in this research is that the context diagram design contains 6 entities and for the data flow diagram (DFD) design it has a level of 2.17 and as many as 22 flowcharts. And produce a website (WEB) that displays an admin page, buyer page and courier page to make it easier for consumers (buyers) to order online.