CEN/TR 14520:2007

Foreword
Introduction
1 Scope
2 Terms and definitions
3 Methods of calculation
  3.1 Open and closed loop systems
      3.1.1 Principle
      3.1.2 Calculation of average number of rotations in the
            system during the calculation period
      3.1.3 Calculation of reuse ratio
      3.1.4 Calculation of average number of rotations in the
            system during the packaging lifetime
  3.2 Hybrid system
4 Factors influencing the calculation
  4.1 Selection of calculation period
  4.2 Selection of measurement point
  4.3 Market fluctuation and product lifecycle
Annex A (informative) - Trips and rotations
Annex B (informative) - Examples of average number of rotations and
                        reuse ratio calculations
        B.1 Average number of rotations
            B.1.1 Example 1
            B.1.2 Example 2
            B.1.3 Example 3
            B.1.4 Example 4
        B.2 Reuse ratio - General example:
        B.3 Rotations during the packaging lifetime
Bibliography

This Technical Report gives methods of assessing the performance of a reuse system related to the proportion of reused packaging in use. This may be measured by:-the average number of rotations during a calculation period and the lifetime; or-the reuse ratio.The choice of method will vary according to the type of reuse system and information available.