Develop a design brief for a mobile app to help a market vendor in Lae, Papua New Guinea, manage sales and inventory.

Here are the steps for the design brief: 1. Investigation To research Mama Huon's problem, I would: Interview Mama Huon: Directly ask about her daily routine, current challenges with the paper notebook (e.g., specific instances of getting wet, losing data), her comfort level with her smartphone, and her specific needs for tracking sales and stock. Observe her business operations: Spend time at her stall in Lae Main Market to understand the environment, customer interactions, and how she currently manages transactions. Talk to other vendors: Gain insights into common challenges faced by small business owners in the Lae market, especially regarding technology use, power, and connectivity. Consider Lae-based challenges: Rain: Design must account for potential water damage or difficulty using a phone in wet conditions. Power outages: The app needs to function reliably even with intermittent electricity, implying low power consumption and offline capabilities. Transport: Understand how she transports goods and if the app can assist with inventory management during transit. 2. Design - The Sketch Screen 1: Login/Home Screen Login: A simple screen with two large, clear buttons: "Login" and "Register". Registration would require minimal information (e.g., name, phone number). Home Screen: After login, a dashboard with large, intuitive icons. A prominent icon for "Record Sale" (e.g., a shopping cart or cash register icon). An icon for "View Sales History" (e.g., a calendar or ledger icon). An icon for "Manage Stock" (e.g., a box or inventory icon). A "Settings" icon (e.g., a gear icon). A clear display of "Today's Total Sales" in large numbers. Screen 2: Sales Entry Screen Product Selection: Large, clear pictures of common items like "Kaukau" and "Greens" with their names below. Users tap the picture to select. Price Entry: A large numerical keypad for entering the price. Quantity: A simple "+" and "-" button next to a quantity display (defaulting to 1). Add to Sale: A large "Add Item" button. Total Display: A running total of the current sale at the top. Complete Sale: A large "Finish Sale" button. Handling Low Literacy: The design would heavily rely on universal icons and pictures* for navigation and actions (e.g., a shopping cart for sales, a calendar for history). Minimal text* would be used, and any text would be in a large, clear font. Color-coding* could be used to differentiate sections or actions. Voice prompts* or audio feedback could be an optional feature to guide users. 3. Production - How It Works The app would function effectively in the Lae environment by: Offline Mode: The core functionality (recording sales, managing stock) would be fully functional offline*. All data would be stored locally on the phone. Data Synchronization: When an internet connection is available (e.g., when Mama Huon returns home and connects to Wi-Fi or has data credits), the app would automatically synchronize the locally stored data to a cloud server. This ensures data backup and allows for future analysis. Battery Saving: The app would use a dark mode or low-contrast color scheme* by default to conserve battery life, especially on OLED screens. It would minimize background processes and push notifications. The app would be designed to be lightweight and efficient, reducing CPU usage. 4. Evaluation & PNG Context Feasibility Assessment: The design is feasible because it focuses on core needs, uses existing smartphone technology, and addresses common local constraints. It avoids complex features that would require constant internet or high processing power. Testing with Mama Huon: I would conduct user acceptance testing* directly with Mama Huon. Provide her with a prototype or early version of the app and observe her using it for her daily tasks. Ask her to perform specific actions (e.g., record a sale, check stock) and note any difficulties or areas of confusion. Gather her feedback through interviews and surveys to understand her experience and identify areas for improvement. Solving PNG-specific problems: Internet Access: The offline-first design* ensures Mama Huon can operate her business without needing constant data credits or reliable internet. Data syncs only when available. Phone Battery: The use of battery-saving colors (dark mode)* and efficient coding minimizes power consumption, extending the phone's operational time between charges. Low Digital Literacy: The design's reliance on large, intuitive icons and minimal text* makes it accessible and easy to learn for users with varying levels of digital literacy. Visual cues reduce the need for reading complex instructions.