Performance points are awarded for evidence provided in the CDP response of actions considered to contribute to climate change mitigation, adaptation and transparency. Actions considered to be more fundamental to progress on combating climate change are awarded more points. External verification/assurance of emissions data is rewarded under the performance scoring as it is considered that this potentially increases the usefulness of the information to decision makers and can act as a pre-qualifier of the data submitted that should be recognized when evaluating performance.
The performance score is also based solely on a company's CDP response. To receive a performance score, a company must achieve a minimum disclosure score of 50. This is to ensure that the judgement is based on sufficient information.
Performance scores are converted to percentages in a similar way to the disclosure score percentage is generated. At the end of scoring, the number of points a company has been awarded is divided by the maximum number that could have been awarded. The fraction is then converted to a percentage by multiplying by 100 and rounded to the nearest whole number.
(Points awarded / points attainable) x 100 = Disclosure Score
The percentages are than grouped into bands and assigned a letter. The percentage range of each of the bands has been set as follows:
Further details can be found n the CDP 2014 guidance, and in the detailed CDP methodology document.