Piece size

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A piece size is a quantity in economics that considers an otherwise overall recorded quantity per piece (e.g. per product unit). As a result, completely different extreme points of the curve shape are often found.

A distinction is made between the following piece sizes:

• costs ${\displaystyle K}$
  • Unit cost ${\displaystyle k}$
    • variable unit costs: ${\displaystyle k_{v}={K_{v} \over x}}$
    • Fixed unit costs: (see also fixed cost degression ) ${\displaystyle k_{f}={K_{f} \over x}}$
    • total (average) unit costs: ${\displaystyle k_{f}={{K_{f}+K_{v}} \over x}}$
• proceeds ${\displaystyle E}$
  • Unit revenue ${\displaystyle e}$
    • fixed unit revenue: ${\displaystyle e_{f}={E_{f} \over x}}$
    • variable unit revenue: ${\displaystyle :e_{v}={E_{v} \over x}}$
    • total (average) unit revenue: ${\displaystyle e={{E_{f}+E_{v}} \over x}}$
• Profit
  • Unit contribution margin : ${\displaystyle db={DB \over x}}$
  • average unit profit: ${\displaystyle g={{DB+E_{f}-K_{f}} \over x}}$