Fatigue-rule breaches
Too little rest after nights or too many consecutive days slip through and raise clinical-governance and employee-relations risk.
OPTIMISATION ENGINE
An optimiser that builds the roster. Not a grid that shows your mistakes.
Techseria Roster searches for the best compliant roster for your whole department in one run. Safety rules are guaranteed, duty is shared fairly, and anything it cannot fill is reported with a reason and a remedy.
Optimisation engine key facts
- Metric 0112Built-in hard rulesNever broken on any run
- Metric 026moDefault fairness look-backConfigurable per organisation
- Metric 031Click to generateA full department roster in a single run
- Metric 040Hidden shortfallsEvery gap is reported
Rules in a planner's head eventually get broken
In spreadsheets every rule depends on someone remembering it at 11pm on the last day of the month.
Why It Matters
How the engine solves it
Constraints, not reminders
Hard rules are mathematical constraints. A roster that breaks one is never produced.
Double booking and wrong-place staff
One person on two slots, or an inpatient pharmacist covering outpatient without permission.
Fairness optimised within the rules
Staff with fewer recent shifts and weekends are preferred so load evens out over time.
Perceived unfairness
Without history, the same reliable people absorb the nights, weekends and public holidays.
Shortfalls reported
When demand cannot be met the Gap Report states date, slot, required, assigned and shortfall.
Repeatable
A fixed seed means identical inputs produce an identical roster, which makes runs auditable.
Why It Matters
Fatigue-rule breaches
Too little rest after nights or too many consecutive days slip through and raise clinical-governance and employee-relations risk.
Double booking and wrong-place staff
One person on two slots, or an inpatient pharmacist covering outpatient without permission.
Perceived unfairness
Without history, the same reliable people absorb the nights, weekends and public holidays.
How the engine solves it
Constraints, not reminders
Hard rules are mathematical constraints. A roster that breaks one is never produced.
Fairness optimised within the rules
Staff with fewer recent shifts and weekends are preferred so load evens out over time.
Shortfalls reported
When demand cannot be met the Gap Report states date, slot, required, assigned and shortfall.
Repeatable
A fixed seed means identical inputs produce an identical roster, which makes runs auditable.
Built-In Hard Rules
Twelve hard constraints enforced on every run
Hard constraints are absolute mathematical boundaries. If all twelve cannot be satisfied simultaneously, the solver never compromises safety—it produces an auditable Gap Report detailing the exact shortfall. Plus an optional alternate-weekend rule and per-slot skill, credential and seniority gates.
No double booking
At most one slot per person per day.
Role eligibility
Staff only fill roles they are eligible for.
No outpatient/inpatient cross-deployment
Unless a named person is explicitly permitted to cross over.
Shift Window Fit
Assignments must strictly align with the employee's designated shift contract window. Staff are never assigned to shifts that overlap with unscheduled hours.
No work on approved leave
Taken directly from Frappe HRMS, with no re-keying.
No work on clinic days
Staff with fixed clinic commitments are never rostered against them.
Minimum rest after nights
Protects against fatigue after night shifts.
Maximum consecutive working days
Stops long unbroken runs of duty.
Rest Week Entitlements
Enforces guaranteed monthly fatigue protection, ensuring full-time staff receive at least two designated rest weeks (or required off-duty cycles) per calendar month.
Weekly shift cap
Keeps weekly load within your limit.
Minimum headcount per slot
Every slot, every day, at or above its minimum.
Pinned night allocations
Pre-agreed night rotations are honoured every cycle.
Under The Hood
Industrial-grade optimisation, tuned for planners
Google OR-Tools CP-SAT is the class of solver used for complex crew and workforce scheduling.
Deterministic results
A fixed random seed gives repeatable, auditable rosters.
Warm start
Uses the previous run as a starting point for faster, more stable re-runs.
Live progress
Planners watch solver progress in real time in the Solver Monitor.
Background processing
Runs as a background job that can have its own worker queue, so HR and ERP users are not slowed.
Configurable solver
Set the time limit, search workers and optimality gap. An audit mode proves optimality.
Solver run log
Inputs, status, timing and solver version are kept so every run can be reviewed.
Cost-Ordered 7-Pass Search Space Pruner
Before executing CP-SAT optimization, our cost-ordered pre-filter prunes ~80% of infeasible assignments in O(1) time (indexed role match, site match, contract type) before running date-range scans, ensuring instant solver scalability for 180+ staff.
Fast Candidate Pre-Filtering
Before scheduling begins, smart pre-filtering instantly eliminates impossible staff combinations based on roles, contracts, and availability. This ensures complex departmental schedules generate in seconds, not hours.
Gaps And Explanations
Know about understaffing weeks ahead
Fix gaps with agency, overtime or redeployment before the day, not on it.
Gap Report
Unfillable demand by date, slot, required versus assigned and shortfall, with a suggested remedy.
Why is this slot unfilled?
An on-demand explanation for any unfilled slot, easy to defend to staff and auditors.
Fairness Summary
Night, weekend, Sunday and public-holiday distribution per person.
Roadmap
Configurable rule library
Available today: tailor safe-staffing, fatigue, and ergonomic policies to your exact hospital guidelines without code changes.
18 rule types, Hard or Soft
Enforce strict safety caps on hours and consecutive days, while balancing soft rules like healthy shift rotation, staff preferences, and weekend equity.
Formula-based custom rules
A safe rule language that never runs arbitrary code, with a catalogue of 18 ready-made measures.
Per-assignment rationale
Store which rules and scores led to each assignment.
Faq
Frequently Asked Questions
See the optimiser run on your data
Book a demo and we will generate a roster for a real month, then show you the Gap Report and Fairness Summary.