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If this approach were followed, it could be argued that the Reference is no longer the Reference once it is based on different assumptions. e.g. assume the ‘true’ Reference has one runway, and a new assumption is the addition of a parallel runway.
For this – amongst other – reasons, airspace designers seek to compare the performance output of the ‘new’ scenarios, in order to establish whether the new scenario(s) meets strategic and/or design objectives.
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The establishment of the Reference Scenario is the first step of the Design Methodology and is undertaken prior to embarking upon the Design Concept. The Reference Scenario usually reflects the current Terminal Airspace, though in some instances, use may be made of a ‘Pseudo’ current Reference Scenario.
As a means of establishing a useful benchmark for comparison with the Design Concept, in order to refine the design objectives and as a mechanism of identifying existing design weaknesses, the Reference Scenario is subjected to qualitative analysis known as a Critical Review.
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3.1 INTRODUCTION .............................................................................................................. C-3-2

3.2 CONCEPTS...................................................................................................................... C-3-3

3.2.1 QUALITATIVE AND QUANTITATIVE ASSESSMENT .....................................................................C-3-3

3.2.2 EVALUATING SAFETY....................................................................................................................C-3-4

3.3 THE SAFETY CASE APPROACH ................................................................................... C-3-6

3.4 OTHER PERFORMANCE CRITERIA .............................................................................. C-3-6

3.4.1 EVALUATING CAPACITY AND ENVIRONMENTAL IMPACT .........................................................C-3-7

3.5 SAFETY, PERFORMANCE AND PROJECT PLANNING ............................................... C-3-7

3.6 SUMMARY ....................................................................................................................... C-3-8

Figure 3 - 1: Evaluating Safety………………………………………………………………C-3-4 Figure 3 - 2: Assessment & Evaluation……………………………………………………..C-3-5 Figure 3 - 3: ESARR Safety Case Approach………………………………………………C-3-6
　
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本文鏈接地址：EUROCONTROL MANUAL FOR AIRSPACE PLANNING 2(16)