I want to replace our spreadsheet-based job-costing sheet with a purpose-built Odoo add-on tailored for construction projects. The module must let me enter an estimate, record every real expense as the job unfolds, and watch the planned-vs-actual figures roll into a live profitability report for each project. It has to speak natively with Odoo CRM so that a job opened from a lead or opportunity keeps the customer, site and contract details in one place. A very small prototype (models, a couple of views, no reporting yet) is available; you are free to refactor or start fresh as long as the final result fits cleanly into standard Odoo and installs with a single click. Core requirements • Cost estimation form that mirrors our current sheet (materials, labour, subcontract, plant, overheads). • Automated capture of actual costs from vendor bills, timesheets and stock moves. • On-screen and printable reports showing variance and gross margin per job. • Seamless link to CRM records so we can launch a quote, convert it to a job and track the pipeline in one flow. Deliverables • Installable Odoo module (.zip or Git repo) with models, menus, security rules and QWeb/Excel export for reports. • Demo data and clear setup notes so I can test on my own database. • Brief hand-over call or video explaining key points in the code. The simpler and more Odoo-native you keep it, the faster we can move to phase two (multi-company and inventory integration), so please tell me how you plan to structure the models and where you might reuse standard objects instead of reinventing them.