Maintenance Workload, Productive Man-Days, Trade Capacity, Overtime, Workfront Limits, Rework, Work-Ready Factor & Schedule Throughput

Naval Shipyard Workforce, Man-Day & Maintenance Throughput Tool

Convert planned maintenance workload into effective shipyard throughput and a labor-bound completion forecast. Simple mode screens one blended workforce. Advanced mode separates trade capacity from maintenance work packages, then shows which skill group, workfront or non-labor schedule floor controls the maintenance duration.

Data type
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Need welding, piping, mechanical, electrical and coatings bottlenecks separated? Click Advanced above.Advanced treats different trades as parallel capacity lanes. Work packages consume only their assigned skill group, so adding people to a non-critical trade will not falsely shorten the whole maintenance period.

Fast Workforce Throughput Screen

One productive man-day is normalized to 8 direct productive labor-hours. Attendance, utilization, overtime effectiveness and workfront/access efficiency reduce or increase the effective daily output of the assigned workforce.

Productive man-days before unplanned/rework allowance.
% added to planned direct workload.
People assigned to the maintenance effort.
% of assigned workforce available on an average workday.
% of available paid hours converted to direct productive maintenance work.
% of regular-hour productivity.
% after congestion, access and simultaneous-work constraints.
Working days.

Schedule & Throughput Basis

Working days.
Used only to convert working days to calendar weeks.
% applied after trade attendance/productivity.
Working days for testing, curing, docking constraints, inspections or other elapsed work that labor alone cannot compress.

Trade Workforce Capacity

Each skill group gets its own headcount and productivity basis. Qualified share is separated from attendance so a large nominal workforce does not automatically become usable skilled capacity.

Skill groupHeadcountAttendance %Qualified / skill-ready %Regular h/dayDirect productive %OT h/dayOT productivity %

Maintenance Work Package Register

Work-ready percentage represents the share of each package that can be converted into executable work without waiting for material, planning, access, permits or predecessor tasks. Package names are not included in Tool Data.

Work packageSkill groupPlanned direct hUnplanned / rework %Work-ready %Max simultaneous workers

Maintenance Throughput Readiness

Shipyard planning screen only: this tool does not produce an approved maintenance schedule, staffing plan, industrial-engineering standard, earned-value forecast or nuclear-work authorization. Actual throughput depends on scope maturity, material, engineering, qualifications, learning, shift structure, facilities, work sequencing, access, testing, inspections, rework and management controls.
Maintenance-throughput context: GAO has identified unplanned work and workforce capacity/performance as major contributors to Navy public-shipyard maintenance delays. GAO also documented sustained high overtime in some production shops and noted concerns about diminished productivity at high overtime levels. In August 2026, GAO reported that attack-submarine depot maintenance delays remained substantial, underscoring the continuing importance of workload, capacity and schedule-throughput management. GAO Navy Shipyards GAO-20-588 · GAO Navy Readiness GAO-26-109256
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