1. We determine the scope and objectives of the review after discussion with the organisation that requested the change. 

This may include: 

• A review of what was to be achieved by the change 
• Air traffic control/management requirements (safety, delay, capacity efficiencies) 
• Military air traffic control/management requirements (if applicable) 
• Environmental conclusions 
• Effectiveness of the change 
• Other benefits or impacts 
• Operational impact (feedback gathered from all affected aviation stakeholders) 
• A post implementation safety analysis. 

2. We identify and confirm the data required from the organisation that requested the change. 
3. We may, during our assessment phase, revise the scope and objectives of the review. 
4. We may request further information from the organisation that requested the change at any time prior to publication of the report. 

1. Organisation gathers data and operational feedback and information from stakeholders. 
2. Organisation submits data to us. 

1. We assess the completeness and adequacy of the data submitted. 
2. Where applicable we independently gather aviation stakeholder feedback.
3. Where applicable we log and analyse written feedback from people and organisations other than airlines, other aircraft operators, airport operators and air navigation service providers.
4. We assess the operational and environmental impact of the change against the expected impact.
5. We consider and determine any appropriate consequential action. 

1. The organisation that requested the change can provide comments.
2. The report is published on our website.