Ecommerce broken-size-run exposure calculator

Calculate styles missing at least one stocked core size and demand-weighted stocked core coverage by style with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use styles missing at least one stocked core size and demand-weighted stocked core coverage by style to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Required core sizes: name, relative demand weight
S,1 M,2 L,1
Stock records: style, size, stock units
A,S,2 A,M,0 A,L,1 B,S,0 B,M,2 B,L,2
Styles missing at least one stocked core size
A, B
Demand-weighted stocked core coverage by style (%)
A: 50; B: 75
Missing core sizes by style
A: M; B: S
Recorded units tied to broken core runs
7
Share of observed styles with broken core runs (%)
100

Try another scenario

Required core sizes: name, relative demand weight
S,1 M,2 L,1
Stock records: style, size, stock units
A,S,2 A,M,0 A,L,1 B,S,1 B,M,2 B,L,2
Styles missing at least one stocked core size
A
Demand-weighted stocked core coverage by style (%)
A: 50; B: 100
Missing core sizes by style
A: M; B: None
Recorded units tied to broken core runs
3
Share of observed styles with broken core runs (%)
50
Calculation method

Calculation method

Styles missing at least one stocked core size

A core size is missing when absent or with zero stock.

Demand-weighted stocked core coverage by style (%)

Sum supplied weights of stocked core sizes / all core weights×100.

Missing core sizes by style

List every missing core size; noncore stock is retained but does not count toward core coverage.

Recorded units tied to broken core runs

Sum all recorded variant stock in styles missing any required core size.

Share of observed styles with broken core runs (%)

Broken style count/observed style count×100.

Symbols and units
a
Required core sizes: name, relative demand weight
b
Stock records: style, size, stock units

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • Core sizes and weights are explicitly supplied. A broken run is a catalogue metric under that definition, not a decision to delist stock or a forecast of lost sales.
Are these inputs private?

These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.

Further reading

Google Merchant Center: product-data terminology and consistency background ↗

Background reading; this does not imply endorsement or independent review of SumFizz.

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