Review

Major System/ Platform Variant

Original Planned

Current Planned

Achieved/ Forecast

Variance (Months)

System Requirements

Core System

Apr 98

Jun 98

2

Final Systems (Fixed Network)

Jul 99

Jun 04

59

Mobile Generic (In Contract)

Jul 99

Mar 05

68

Preliminary Design

Core System

Nov 98

Jan 00

14

Final Systems (Fixed Network)

Jul 00

Aug 05

61

Mobile Generic (In Contract)

Feb 00

Jul 05

65

Critical Design

Core System

Nov 99

Dec 00

13

Final Systems (Fixed Network)

Dec 01

Nov 06

59

Mobile Generic (In Contract)

Dec 02

Nov 06

47

Variance Explanations

System Requirements Review delayed due to requirements instability. The June 1999 Deed of Agreement acknowledges 'requirements instability'.

Preliminary Design Review: Requirements instability & scope changes.

Critical Design Review Final Systems and Mobile: Contractor delays with software development and system integration design.