Review

Major System / Platform Variant

Original Planned

Current Planned

Achieved /Forecast

Variance (Months)

Notes

Preliminary Design

JSF Air System (CTOL Variant)

Mar 03

July 03

4

1

Critical Design

JSF Air System (CTOL Variant)

Apr 04

Feb 06

Feb 06

22

2

Notes

1

Aircraft weight was the major issue that delayed the closure of the Preliminary Design Review (PDR) by approximately three months.

2

Design refinements following PDR failed to achieve the weight savings initially expected and considerable additional design effort was required. The original planned CTOL Critical Design Review (CDR), planned for April 04, was re-scheduled to February 2006 after the redesign effort was complete and included the 'roll up' of many lower-tiered reviews.