Legacy System Modernization Using Open Source Tools and Agile. Adam D Angelo

Transcription

1 Legacy System Modernization Using Open Source Tools and Agile Adam D Angelo

2 Legacy Systems Simply being old doesn t mean something is inefficient 2

3 Legacy Systems and Platforms Problems The high cost of operating the mainframe and other legacy platforms Integrating the application and its data more effectively with the balance of the organization Shrinking pool of IT personnel that understand the older system languages and structure Need for faster application evolution in response to changing requirements by use of more modern software engineering methods 3

4 Legacy Systems and Platforms Benefits Often, the longer code has been running the better it becomes if bugs are fixed over time Excellent performance-at-scale processing power The current users understand the system and are comfortable with how it works If the hardware and software have been updated, mainframes are secure and nearperfect reliability 4

5 IT Spending Average IT Spending across All Industries 70% 19% 11% Source: Gartner, Run Grow Transform 5

6 Operations and Maintenance O&M becomes an Anti-Pattern when Initial software release was incomplete Staffing levels are greatly diminished Lack of automated testing makes adding new features risky Technical debt is not paid off Patchwork code is created that quickly becomes unmaintainable 6

7 When Should We Modernize? Difficulty maintaining the system and providing new features Cost of maintenance is too high Legacy system does not integrate well with our enterprise architecture 7

8 Organizational Culture Management of many is the same as management of few. It s a matter of organization - Sun Tzu 8

9 Building an Adaptive Organization Tools Empower developers to leverage the best tools for the job Standardize around data and features, not around tools and platforms Communication Enable clear communication channels Hierarchical communication channels lead to inefficient communication Facilitate the alignment of goals Dependency Management Remove external dependencies Make external dependencies internal dependencies People Develop self-sufficient teams Allow teams to fail and adapt Empower them to innovate 9

10 The Art of Scalability By Martin Abbot and Michael Fisher 10

11 Organizational Structure Functional Organizational Structure Head of IT Development Manager QA Manager Engineering Manager Development Teams Quality Assurance Teams Infrastructure Teams Pro: Homogeneous teams; Engineers work with engineers Con: Poor cross-functional communication and affective conflict between organizations 11

12 Organizational Structure Matrix Organizational Structure Head of IT Development Manager QA Manager Engineering Manager PM 1 PM 2 Development Product 1 Quality Assurance Product 2 Infrastructure Pro: Improved cross-team communication Con: Multiple managers, communication overhead 12

13 Organizational Structure Agile Organizational Structure Head of IT Director 1 Director 2 Team 1 PM UX Devs QA Inf. Eng. CSM Team 2 PM UX Devs QA Inf. Eng. CSM Team 3 PM UX Devs QA Inf. Eng. CSM Team 4 PM UX Devs QA Inf. Eng. CSM Pro: Cross-functional, self-organizing teams increase empowerment and cognitive conflict 13

14 Putting Off Failure "Nobody ever got fired for choosing IBM 14

15 You Can Fail Big 15

16 or You Can Fail Small 16

17 Fail Fast, Fail Often "Ever tried. Ever failed. No matter. Try again. Fail again. Fail Better. -Samuel Beckett 17

18 More Bad News Modernizing legacy software is a complex engineering effort that includes all aspects of software development, but with more constraints Stakeholders are frequently happy with how the system currently functions and do not want change Anything short of total success is a complete failure 18

19 Meat Loaf 19

20 Leading Modernization Using Agile We shall be unable to turn natural advantage to account unless we make use of local guides. -Sun Tzu 20

21 Leverage Open Source Tools Configuration Management Automation Used to build and manage Java-based projects Distributed sourcecontrol repository Repository that enables dependency management Testing Configuration management tool for writing system configuration recipes to enable the automation of infrastructure Automation server used to enable the CI/CD of applications. Unit testing framework for the Java programming language Centralized place to review issues with code quality Used to create automated functional tests 21

22 Be An Agile Champion Is there a leader in your company championing Agile change? Can your Scrum Masters protect your processes? Are your Product Owners empowered to make decisions on behalf of all stakeholders? Have your development teams bought into the process? 22

23 Share Your Plan Information Radiators Scrum or Kanban boards Burndown charts Test coverage reports Agile Roadmap Product Backlog 23

24 Minimally viable product How do we convince users who have a fully functioning system to accept less? How can we give them more? 24

25 Thank you! Adam D Angelo adam.dangelo@devtechnology.com 25