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Scrum at BT
Geoff Watts Roger Leaton
About • Global provider of network-centric solutions, services & products
• (2006/07) 40% of revenues from “new-wave revenues”
• 6m Broadband users
• Company Stats:
– 100,000 staff globally (25,000 outside UK)
– 20 million ( Residential & Business Customers)
– Annual Turnover ~ £20 Billion (2007)
– £2.3 Billion NHS contract (2004)
• IT Organisation – BT Design
– 8000 People
– 4000 on customer facing IT
– 6000 subcontract staff in India
How it was before?
Efficiency & Adaptability
Business does not want “technical success”
Why Agile?
“It is not the strongest of the species that survives, nor the most intelligent,
it is the one most adaptable to change”
- Charles Darwin
Challenges at BT
“Of all the places to try agile, why would anyone
choose [BT]”
- JP Rangaswami BT Global Services CIO
Crossing the Chasm
Crossing the Chasm, Geoffrey A. Moore, 2002.
Conservatives
Sceptics
Pragmatists
Early Adopters
Visionaries
Need Coaches
The Coaching Team
Education
Community
BT Agile Awards
Prove it
As a customer I want to know when my Service is ready to use asap So I can maximise my ROI
Agile Planning
Release planning • Backlog
• Prioritise • Estimate (points) • Acceptance criteria
• Validation • Iteration plan(s)
Planning is continuous
Iteration planning • Iteration plan
• Learn • Prioritise • Estimate (points)
• Tasks and Tests • Re-plan
Vision
Product Backlog
Vision Product Backlog
Scrum Team Scrum Team Scrum Team
Sprint Backlog Sprint Backlog Sprint Backlog
Product Line 2
No end to end owner!
Operational process
Product Line 1
Product Line 3
OSS Developers
Network rollout
Product delivery
managers
External Network Vendors
15000+ Sub-
contract developers
primarily offshore
OSS Design Network rollout
SOA Architects
BT Design
21C - The Starting Point
Classic sub-optimised Waterfall organisational structure
BT Operate
BT Wholesale
BT Retail
BT Openreach
Kick-Off
• Initial event for management team – Essential to get buy-in for top-down
support
– Lean Analysis workshop
– External consultants
• Major Team Event – Large scale Agile simulation
– Focus on end to end delivery
• Product and team selection for initial target
End to End Product Delivery Management Team
Product Line 2
No end to end owner!
Operational process
Product Line 1
Product Line 3
OSS Developers
Network rollout
Product delivery
managers
External Network Vendors
15000+ Sub-
contract developers
primarily offshore
OSS Design Network rollout
SOA Architects
BT Design
Classic sub-optimised Waterfall organisational structure
BT Operate
BT Wholesale
BT Retail
BT Openreach
The New “Team”
Planning
• Dumped 8 month Milestone plan • Prioritised backlog of stories, 2 week
iterations and 8 week release cycles • Focus on 1 real customer working • Delivered in 4 customers in 8 weeks • Speed exposed the targets for follow-up
transformation activities
Aug
Sept
Nov
Oct
Mar
Jan
May
Apr
Dec
Feb
Follow-up
• Heavy coaching activity – Extending approach to other teams – Based on business priority products – Extending learning
• Operating continuous improvement initiative – Fixing core issues raised bottom up
Component User Stories Code/Unit test System Test Integration Test
Component User Stories Code/Unit test System Test Integration Test
Component User Stories Code/Unit test System Test Integration Test
Typical BT Value Stream
Effectiveness = 48.35/467 = 10.3%
2 days
Design Review
1 day
5 days
342 days
Component User Stories
5 days
15 days
359 days
2 days
Code/Unit Test
15 days
15 days
376 days
2 days
System Test
2 days
10 days
387 days
1 days
Integration Test
2 days
15 days
402 days
0 days
UAT
5 days
10 days
457 days
Wait for release every 90 days
0 days
45 days
447 days
45 days
Deploy
48.35 days
467 days
10 days
Initial concept
Value
Time
Cumulative Time
Release review (90 days) Hothouse
1 day
3 days
285 days
Initial Sift
0.1 days
1 day
62 days
30 days
Business Case
10 days
30 days
102 days
10 days
High Level Solution Design
5 days
30 days
325 days
6 days
Detailed User Stories
2 days
2 days
289 days
2 days
HL Stories
0.25 days
1 day
1 day
1 day
Queue for go
0 days
180 days
282 days
180 days
Component User Stories Code/Unit test System Test Integration Test
Component User Stories Code/Unit test System Test Integration Test
Component User Stories Code/Unit test System Test Integration Test
Effectiveness = 48.35/467 = 10.3%
2 days
Design Review
1 day
5 days
342 days
Component User Stories
5 days
15 days
359 days
2 days
Code/Unit Test
15 days
15 days
376 days
2 days
System Test
2 days
10 days
387 days
1 days
Integration Test
2 days
15 days
402 days
0 days
UAT
5 days
10 days
457 days
Wait for release every 90 days
0 days
45 days
447 days
45 days
Deploy
48.35 days
467 days
10 days
Initial concept
Value
Time
Cumulative Time
Release review (90 days) Hothouse
1 day
3 days
285 days
Initial Sift
0.1 days
1 day
62 days
30 days
Business Case
10 days
30 days
102 days
10 days
High Level Solution Design
5 days
30 days
325 days
6 days
Detailed User Stories
2 days
2 days
289 days
2 days
HL Stories
0.25 days
1 day
1 day
1 day
Queue for go
0 days
180 days
282 days
180 days
Agile Value Stream
Initial concept HL Stories Product Level
Planning
Release Level
Planning
Iteration Level
Planning Build & Test Deploy
Value
Time
Cumulative Time
0.5 days
1 days
25 days
0.25 days
1 day
1 days
1 days
2 day
12 days
0.5 days
2 days
24 days
25 days
25 days
50 days
Wait for team
0 days
10 days
22 days
27.25 days
50 days
1 days 10 days 180 days
Effectiveness = 27.25/50 = 54.5%
Automated Testing
• Not for legacy? • It’s too big and complex to think
about
• But we have distributed teams • Slow across the network? • Dev is separate from SYS/INT
What next?
“Success is not final, failure is not fatal: it is the courage to continue that counts.”
- Winston Churchill
Customers & Suppliers
Brendan Kennedy 10th May 2007
Round Tables
Agile Heartbeat
• establish a vision
• change always happens
• so prioritise your activity
• do something small
• get feedback
• decide next steps
We are committed to contributing positively to society and to a sustainable future. This is part of the heart of BT.
Contact
• Questions • Further Information • Training
• Consultancy • Coaching
Please contact [email protected] +44 7717 111199
