In labor-intensive manufacturing, the constraint is rarely machines — it is who is on shift, whether they are certified for the operation, and how their actual hours compare to standard time. ERPNext v15/v16 gives you Work Centers, Job Cards, Operations with standard times, and an HR module for Shift Type, Attendance, and Employee Checkin, but these live in separate silos. Core ERPNext has no concept of a roster that assigns a certified operator to a Job Card, no capacity gap alert when a shift is short-staffed, and no report that puts logged Job Card time against the operation's standard time to surface efficiency. Supervisors end up rebuilding this in spreadsheets every week, and the plant flies blind on labor productivity.

We build a proper Frappe app — a dedicated module with its own DocTypes — installed onto your bench alongside ERPNext, not a fragile pile of customizations. The core is a Shift Roster DocType (per Work Center, per day/week) with a child table of assignments that link an Employee, a Shift Type, and a target Job Card or Operation. A Operator Skill / certification matrix DocType records which operators are qualified for which Operations, with optional expiry dates; assignment logic (a whitelisted server method plus a validate hook in hooks.py) refuses or warns when you roster an uncertified or lapsed-certification operator. When a Job Card is started, doc_events on Job Card and Employee Checkin reconcile clock-in/clock-out against the assignment so logged labor is attributed to the right operation and person.

Labor efficiency is computed by comparing actual Job Card time logs against the operation's time_in_mins standard, rolled up per operator, Work Center, shift, and item into a Query/Script Report and dashboard chart. Scheduler events (scheduler_events in hooks.py) run nightly to recompute efficiency snapshots and daily to raise capacity-gap and overtime alerts — for example, flagging a Work Center whose rostered certified hours fall short of released Work Order demand, or an operator trending past an overtime threshold. Everything is exposed through the standard Frappe REST API and whitelisted methods, so your MES, biometric terminals, or a shop-floor tablet UI can post check-ins and read the roster. Client scripts add the shop-floor conveniences — filtering the operator picker to certified employees, color-coding gap cells — and role profiles plus permission rules keep supervisors scoped to their own Work Centers while HR-ops sees the plant.

This is build-to-order: it is not an instant download. You start with a short scoping call, we confirm the exact roster rules, skill matrix, shift patterns, efficiency formula, and alert thresholds for your plant, then we build against your ERPNext v15 or v16 version. Typical delivery is 2-4 weeks from confirmed scope. You get the installable app source, UAT on a staging bench with a rollback plan, install and configuration on your environment, documentation, a training session, and a post-go-live support window. The full git repository is handed over to you at the end.