Lukas Alperowitz Technische Universität München, Chair for Applied Software Engineering Introducing Continuous Delivery of Mobile Apps in a Corporate Environment: A Case Study 23 May 2015 RCoSE 2015 Stephan Krusche Twitter: @skrusche Email: s.krusche@tum.de Web: www.skrusche.de
Introducing Continuous Delivery of Mobile Apps in a Corporate Environment: A Case Study 2 Digital technologies become key factors for companies, in particular mobile computing Mobile-Computing is a strong driver for digital transformation Agile Development is the key to an effective realization
Introducing Continuous Delivery of Mobile Apps in a Corporate Environment: A Case Study Rugby’s Release Management Workflow 3 Version Control Server Developer 1 notify upload build 5 download 6 Issue Tracker notify store feedback 10 release 4 Release Manager checkout, compile and test build 2 upload feedback give feedback 9 Continuous Integration Server Continuous Delivery Server 7 Device 8 inform about build status commit 3 11 User RCoSE 2014 Evaluation in university projects —> leads to more releases & feedback
Introducing Continuous Delivery of Mobile Apps in a Corporate Environment: A Case Study Situation at Capgemini revealed with interviews Continuous integration and delivery of mobile apps in a (heterogeneous) project- based organization is complex and expensive and therefore neglected at Capgemini 4 Process No standardized development process for mobile applications, often isolated custom solutions Continuity Continuity is missing in the development Infrastructure Existing project environments are not sufficient Prioritization Automatic delivery and testing is neglected in favor of development speed
Introducing Continuous Delivery of Mobile Apps in a Corporate Environment: A Case Study Additional Requirements at Capgemini • Support of multiple mobile platforms (including cross-platform) • High security for business critical applications • Consideration of access control and data privacy • Support of different project environments • Consideration of dependency management • Ability to distinguish between user-generated and automatic feedback • Ability to manually deliver an application ➡Project managers want the ability to tailor the workflow to their own needs 5
Introducing Continuous Delivery of Mobile Apps in a Corporate Environment: A Case Study 6 User Developer Delivery Integration Configuration Management Feedback Components of the release management workflow
Introducing Continuous Delivery of Mobile Apps in a Corporate Environment: A Case Study 1) Example of tailored workflow for a larger project 8 Developer Build 2.1 Upload app 3.1 Test 2.2 Delivery Service User Download app 3.4 Send email 3.2 Integration System Repository Push changes 1.1 Package 2.3 Collect metrics 2.4 Issue Tracker Observe changes 1.5 Resolve dependencies 1.4 Send automatic feedback 4.1 Forward email 3.3 Update status 4.2 Release Manager Trigger build 1.2 Email Server Fetch changes 1.3 Notify about build 2.5 Integration Configuration Management Delivery Feedback manual build only automatic feedback automatic distribution
Introducing Continuous Delivery of Mobile Apps in a Corporate Environment: A Case Study 2) Example of tailored workflow for a smaller project 9 Developer Build 2.1 Test 2.2 Delivery Service Integration System Repository Push changes 1.1 Trigger build 1.2 Fetch changes 1.3 Upload app 3.1 Package 2.3 Send user-generated feedback 4.3 Issue Tracker Forward email 3.3 Update status 4.4 Release Manager Send email 3.2 User Download app 3.4 Download app 3.0 Integration Configuration Management Delivery Feedback no dependency management manual distribution only user- generated feedback no metrics
Introducing Continuous Delivery of Mobile Apps in a Corporate Environment: A Case Study Research Questions 1) Integration: How are projects building and testing changes and how often and timely are they doing it? 2) Testing: Which types of tests are projects employing and how are these tests run respectively? 3) Metrics: Which metrics are collected, how are they collected and how is the information used? 4) Delivery: How are projects delivering new builds to users, how much time and effort does it cost and how many users can be reached? 5) Feedback: Which feedback channels are used, how frequently is feedback collected and what is the quality of feedback? 11
Introducing Continuous Delivery of Mobile Apps in a Corporate Environment: A Case Study Study Design 1) Investigation of 8 projects developing mobile applications (mostly iOS and Android) at Capgemini with customers from different industrial sectors 2) Introduction of Rugby’s extended and tailorable release management workflow 3) Conduction of personal interviews about the use of the workflow • Interviewees with multiple years of experience in the mobile domain • Familiar with agile methodologies and continuous integration • Little experience with automated delivery 12
Introducing Continuous Delivery of Mobile Apps in a Corporate Environment: A Case Study Findings: Integration • More projects use integration systems (88% instead of 25% before) • Frequency of integration increased • More projects use dependency management (75% instead of 13% before) ➡Reduced time for integration and immediate feedback about the build state 13 38%$ 13%$ 38%$ 88%$ 25%$ 0%$ 10%$ 20%$ 30%$ 40%$ 50%$ 60%$ 70%$ 80%$ 90%$ 100%$ Before$ After$ Immediately$ Regularly$ Sporadically$
Introducing Continuous Delivery of Mobile Apps in a Corporate Environment: A Case Study Findings: Metrics Majority of projects makes use of automatic metrics: • Static analysis tools provide codebase metrics like code quality and test coverage ➡ Continuous quality assurance • The integration system reports build success rate and duration of build and test steps ➡ Status monitoring • Project metrics (e.g. velocity, cycle time) are obtained from the issue tracker ➡Decision support 15 8%# 65%# 75%# 38%# 13%# 5%# 6%# 8%# 5%# 0%# 10%# 20%# 30%# 40%# 50%# 60%# 70%# 80%# 90%# 100%# Before#After# Before#After# Before#After# Codebase# Integration# Project# Automated# SemiCautomated# Manual#
Introducing Continuous Delivery of Mobile Apps in a Corporate Environment: A Case Study Findings: Delivery • About 60% use automated delivery, about 40% semi-automated delivery (before 0%) • Involvement of team members reduced by 25% (median) • Delivery time reduced to 5 min (median) ➡High time savings and immediate availability of changes in releases 16 43% 38% 57% 50% 100% 100% 13% 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% Before After Before After Internal External Automated Semi>automated Manual
Introducing Continuous Delivery of Mobile Apps in a Corporate Environment: A Case Study Threats to Validity • Reliability: Duration of the evaluation period, number of metrics, or level of detail may have influence on the reliability of our results • Generalizability: Number of projects and variation of project characteristics may be too low in order to achieve generalizable results • Selection bias: Projects participating in our survey may have already worked in an agile fashion and had interest in automated integration and delivery • Researcher bias: An appreciation for agile in general or our solution in particular and positive results of our previous study may have influenced our evaluation 18
Introducing Continuous Delivery of Mobile Apps in a Corporate Environment: A Case Study Conclusion • We showed how to introduce continuous delivery in a corporate environment where no standardized workflow for mobile projects existed before • Duration of integration and delivery decreased while their frequency increased • Automated testing and metrics collection improved • Due to the close evaluation after the introduction of the workflows we could not find significant changes in the feedback collection ➡The tailorable workflow provides a good compromise between technical promises and actual business needs ➡The value of the introduced workflow is appreciated, especially low time and effort required for setup that allows projects to get started quickly 19
Introducing Continuous Delivery of Mobile Apps in a Corporate Environment: A Case Study Outlook • Rugby’s components have the potential for highly complex and individual setups, e.g. • Finer control over the build process with build matrices and branch filters • Automated user interface tests • Integration tests with a backend built in parallel • Longer observation period in the evaluation • Improve the incorporation of user needs • Evaluate whether development behavior and feedback change over time 20
Environment: A Case Study Thank you! Sebastian Klepper, Stephan Krusche, Sebastian Peters, Bernd Bruegge and Lukas Alperowitz Technische Universität München, Chair for Applied Software Engineering RCoSE 2015 Stephan Krusche Twitter: @skrusche Email: s.krusche@tum.de Web: www.skrusche.de
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