Rail, Transit & Rolling Stock Manufacturing worked example

Carbody Weld Hours at 12% setup, fixturing, and inter-pass delay allowance: a worked example

What does the result look like when setup, fixturing, and inter-pass delay allowance reaches 12%? The full calculation is worked below with real intermediate numbers. Use it when carbody weld hours in rail, transit and rolling stock manufacturing is changing rate or allowance and you want to see the impact.

The inputs for this scenario

  • Weld seam length or joints per carbody: 120 units (unchanged)
  • Welding deposition rate (seam or joints completed): 12 units / min (unchanged)
  • Setup, fixturing, and inter-pass delay allowance: 12 % (raised for this scenario; the documented default is 10)

Working through the calculation

  • Applying the documented formula (Base carbody weld hours time = carbody weld hours workload รท carbody weld hours completion rate) to the inputs above produces each figure below.
  • At this operating point the engine returns 11.2 hr for required carbody weld hours time, the number this scenario is built around.
  • At this operating point the engine returns 10 hr for base carbody weld hours time.
  • At this operating point the engine returns 12 % for carbody weld hours allowance applied.
  • At this operating point the engine returns 12 pieces / min for carbody weld hours completion rate.

How this compares with the baseline

  • Against the tool's baseline example, where setup, fixturing, and inter-pass delay allowance sits at 10% and the headline result is 11 hr, this scenario comes in 1.82% above the baseline at 11.2 hr.
  • A figure at this level is achievable when setup, fixturing, and inter-pass delay allowance is genuinely sustained, not just peaked for a shift. The single completion-rate figure assumes steady deposition; it won't capture position changes, arc-off cleaning, or distortion rework that can add 20-40% on thin stainless skins.

Results at a glance

  • Required carbody weld hours time: 11.2 hr (headline result)
  • Base carbody weld hours time: 10 hr
  • Carbody weld hours allowance applied: 12 %
  • Carbody weld hours completion rate: 12 pieces / min

Run it with your numbers

  • Every input above is editable in the live Carbody Weld Hours calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.