Glass Container & Bottle Manufacturing worked example

Bottle Weight Variation at 110% weight study capture efficiency: a worked example in glass container & bottle manufacturing

This scenario runs the bottle weight variation calculation on the strong side: 110% weight study capture efficiency, with every other input held at its documented default. Use it when process engineering or quality needs to translate gob weight drift, container weight variation, or overweight bottles into a material-impact number the forming and furnace teams can act on.

The inputs for this scenario

  • Containers in weight study: 24,000 containers (unchanged)
  • Average weight deviation per container: 3.5 g / container (unchanged)
  • Weight study capture efficiency: 110 % (raised for this scenario; the documented default is 100)

Working through the calculation

  • Applying the documented formula (Theoretical glass weight variation = containers represented by weight study × average weight deviation per container) to the inputs above produces each figure below.
  • At this operating point the engine returns 76,364 g for glass weight variation allowance, the number this scenario is built around.
  • At this operating point the engine returns 84,000 g for theoretical glass weight variation.
  • At this operating point the engine returns -7,636 g for variation scaling allowance.
  • At this operating point the engine returns 110 % for weight study capture efficiency.

How this compares with the baseline

  • Against the tool's baseline example, where weight study capture efficiency sits at 100% and the headline result is 84,000 g, this scenario comes in 9.09% below the baseline at 76,364 g.
  • Use it when a weight study flags gob-weight drift and you need to size the cumulative glass mass or cost impact across a run rather than per bottle. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.

Results at a glance

  • Glass weight variation allowance: 76,364 g (headline result)
  • Theoretical glass weight variation: 84,000 g
  • Variation scaling allowance: -7,636 g
  • Weight study capture efficiency: 110 %

Run it with your numbers

  • Every input above is editable in the live Bottle Weight Variation calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.