Admins, supervisors, and operators each get their own screens in OpenMES, a free self-hosted manufacturing execution system for small factories. Drag work orders across weekly, daily, hourly, and monthly planner views, and any order that stock cannot cover gets flagged. Automatic scheduling drafts a feasible plan from shift calendars, maintenance, and material shortages, and nothing changes until a supervisor applies it, with undo. Work orders carry partial batches, reusable process templates, and priority scores built from customer tier, planned quantity, and hours until due, and CSV or Excel imports bulk-load orders, materials, and recipes. Operators work from touch-optimized tablet queues, where one tap starts, completes, or reports an issue, even offline, and a critical issue halts production automatically. When a machine stops, MQTT, Modbus TCP, or OPC UA signals record the downtime automatically, and the same signals drive good and reject counters and OEE. At goods-in, an inbound inspection records pass or fail criteria and a disposition such as accept, rework, scrap, or quarantine. Material lots track received and available quantities with hold and release status, and the production cost report splits each finished order into material, labor, and additional costs, with CSV export. Supervisors follow the shift on a live monitor. Webhooks, a REST API, and hook-based modules connect OpenMES to ERP systems and custom code. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. AGPL-3.0 licensed.