Scope of the Assurance
Lloyd's Register Quality Assurance, Inc. (LRQA) was engaged by Chevron to review the processes used in the creation of Chevron's 2008 Corporate Responsibility Report. The objective of the review was to validate the integrity of Chevron's reporting processes. The review did not extend to LRQA's evaluating the accuracy of data input into Chevron's report. The scope of the assurance also was limited to the health, environmental and safety (HES) performance indicators.
The Chevron 2008 Corporate Responsibility Report has been approved by Chevron management, who are solely responsible for the collection, presentation and accuracy of all data and information presented.
Approach
In order to form our conclusions, we obtained sufficient evidence that we consider necessary for us to give limited, not absolute, assurance.1 Our assurance approach was risk-based and undertaken as a sampling exercise. It covered the following activities:
- Interviewing key personnel to identify and gain an understanding of Chevron's reporting requirements.
- Reviewing the documented reporting requirements to validate consistency of scope, definition and reporting for each of the HES performance indicators.
- Sampling two business units to assess local understanding and implementation of Chevron's HES reporting requirements.
- Reviewing the processes used to aggregate data and information at the corporate level for inclusion in the final report.
Conclusions and Findings
Based on the scope of the assurance, LRQA believes that Chevron's reporting process is effective in delivering health, environmental and safety indicators for the purpose of evaluating and communicating corporate performance in these areas.
Our other conclusions:
- The methods used for calculating each HES performance metric are clearly defined and communicated.
- Chevron's reporting requirements are understood and carried out. Data are collected at the business unit level, checked and aggregated into corporationwide metrics.
Responsibility for annually reviewing and updating reporting guidelines is clear, and improvement in methodology is regularly undertaken.
Thomas Sliva
On behalf of Lloyd's Register Quality Assurance, Inc.
April 29, 2009
Lloyd's Register, its affiliates and subsidiaries and their respective officers, employees or agents are, individually and collectively, referred to in this clause as the 'LR Group.' The LR Group assumes no responsibility and shall not be liable to any person for any loss, damage or expense caused by reliance on the information or advice in this document or howsoever provided, unless that person has signed a contract with the relevant LR Group entity for the provision of this information or advice, and in that case, any responsibility or liability is exclusively on the terms and conditions set out in that contract.
1 The assurance undertaken by LRQA did not verify data and information back to its original source(s).