EUROCONTROL MANUAL FOR AIRSPACE PLANNING 2(86)

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1.4.2.1 Time and Resources
The number and extent of validation methods used and their duration is directly linked to the complexity of the Design Concept and the complexity of the Traffic Sample. As more changes are envisaged and the greater their safety and operational impact, the greater the requirement becomes for accurate and detailed investigation to prove their operational benefits and fulfilment of safety criteria.
The diagram below shows that each validation method has its own requirements with regards to time and resource allocation. In general terms, it may be said that the preparationtime and resource demands increase directly with the complexity of the model used. The representation shown in Figure 1 - 4 reflect the contents of Figure 1 - 1.
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Figure 1 - 4: Time Requirements
For these reasons, the design team should allocate enough time in the project plan for the appropriate level of assessment (modelling, fast time and real time simulation, live trials – See Part B, Planning). The planning should be made as flexible as possible because the results of one Validation method could heavily impact upon the next Validation step in the sequence or could lead to the suspension of the validation process and a return to the design phase – see Figure 1-5.
Naturally, there is merit in returning to the design phase if the combination of a qualitative and quantitative validation method returns a discouraging result. For avariety of reasons, not the least being cost, it is better to return to thedrawing board sooner rather than later. This is shown in Figure 1-6.
 
 
Page D-1-8   Released Issue   Edition: 2.0Amendment 1 – 17/01/05
 

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Figure 1 - 5: Knock on effect of validation findings across various methods
Part D
VALIDATION METHODOLOGY
OVERVIEW

Part C
Part E
IMPLEMENTATION & REVIEW
Figure 1 - 6: Return to the design phase – if necessary
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As is evident from the preceding paragraph, Validation can be a lengthy and expensive phase of the Terminal Airspace design process and careful planning and preparation andscheduling of resources is required to optimise the use of the available resources.
Comment: Simulations are usually prepared, managed and run by specialists who are experts in a specific type of simulator e.g. fast-or real-time simulator, flight simulator, etc. Nevertheless, it is strongly recommended that the Terminal Airspace design team actively participate in the planning, preparation and running of simulations. Amongst other things, this will help to ensure that the design objectives are maintained, that the Simulation Base and Test Cases correctly reflect the Reference and Conceptual Scenarios on which they are based, and that qualitative assessment is not abandoned during the validation phase.
　
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