Field service: evaluation

Synthetic regions of 10 technicians over four weeks; settings chosen on separate tuning regions.

91.7% vs 75.7%appointments kept: optimised plans vs the dispatcher's list (held-out)

43% lessdriving per job (10.7 km vs 18.7)

99.6% vs 72.8%first-time fix: van kit planned for the day vs a standard kit

90.4%first-time fix with the planned kit in the shifted regions, where a quarter of brands were new

Held-out regions: 10 regions

Planner	Appointments kept	km per job	Overtime h / tech-day	Avg days waited	Backlog
Dispatcher's list (nearest free technician, in booking order)	75.7%	18.7	0.09	0.27	205
Optimised (tight windows first, cheapest insertion, moves between routes)	91.7%	10.7	0.09	0.10	125

First-time fix: standard kit 72.8%, planned kit 99.6%.

Planner	Appointments kept	km per job	Overtime h / tech-day	Avg days waited	Backlog
Dispatcher's list (nearest free technician, in booking order)	60.3%	17.9	0.43	0.46	250
Optimised (tight windows first, cheapest insertion, moves between routes)	84.4%	11.1	0.28	0.16	196

First-time fix: standard kit 71.9%, planned kit 90.4%.

Planner	Appointments kept	km per job	Overtime h / tech-day	Avg days waited	Backlog
Dispatcher's list (nearest free technician, in booking order)	75.4%	18.9	0.09	0.32	109
Optimised (tight windows first, cheapest insertion, moves between routes)	88.9%	10.4	0.10	0.15	90

First-time fix: standard kit 73.8%, planned kit 99.5%.

Check	Value	Limit	Result
heldout_km_ratio_max	0.5717	0.75	pass
heldout_kept_gain_min	0.1599	0.05	pass
heldout_first_time_fix_gain_min	0.2685	0.1	pass
shifted_km_ratio_max	0.6196	0.8	pass
shifted_first_time_fix_gain_min	0.185	0.05	pass