Introductory material about development flow and software science. TOPICS - Technical Debt - DevOps - Lean Software Development - Software Quality - Clean Architecture - Gamification & Fun - Team Culture

1. IMPROVING
DEVELOPMENT
FLOW
INTRODUCTORY MATERIAL

2. LEAN
PRINCIPLES
ELIMINATE
WASTE
BUILT-IN
QUALITY
DELIVER
LEARN
DEFER
DECISIONS
360º
PANORAMA

3. LEAN
PRINCIPLES
ELIMINATE
WASTE
BUILT-IN
QUALITY
DEFER
DECISIONS
360º
PANORAMA
CODING
MANAGEMENT
ARCHITECTURE
DEVOPS

4. DEVELOPMENT
Key Elements
FLOW
SMART
OPERATIONS
CLEAN
ARCHITECTURE
BEAUTIFUL
CODE
TEAM
CULTURE
LEAN
MANAGEMENT
MEASURABLE
UX

5. PRESERVING
DEVELOPMENT FLOW
GOOD CODE
DIRTY CODE
COST ($)
TIME (⌚)

6. PRESERVING
DEVELOPMENT FLOW
NO FUTURE
DIRTY CODE
X
COST ($)
REWRITE
OPPORTUNITY
TIME (⌚)
BANKRUPTCY

7. PRESERVING
DEVELOPMENT FLOW
Pressure applied
RESULT
On time, On budget
CLAIM
Productivity improved
REMAINING
WORK
TECHNICAL
DEBT
TIME
PLANNED
RELEASE
FULL QUALITY
RELEASE

8. PRESERVING
DEVELOPMENT FLOW
FLUIDITY
BOOST
ADAPTABILITY
SHRINK
VISCOSITY
STAGNATION

9. SOFTWARE
QUALITY
ISO9126
FUNCTIONALITY
RELIABILITY
PORTABILITY
INTERNAL
EXTERNAL
QUALITY
EFFICIENCY
MAINTAINABILITY
USABILITY

10. SOFTWARE
COMPLEXITY
DIFFICULTY
PROGRAMMER
PROGRAM
debugging modifying
coding testing

11. SOFTWARE
METRICS
SIZE
METHOD
CLASS /
MODULE
Comment Percentage - CP
Source Lines of Code - SLOC
# Methods, Files, Classes &c.
Cyclomatic Complexity - CC
Test Code Coverage - TCC
Coupling Between Object Classes - CBO
Lack of Cohesion in Methods - LCOM

12. SIZE
Less is more. Sometimes...

13. SIZE
FATTEN
SOURCES
Feature creep
Patchwork
Automated tools
Heavyweight frameworks
Careless packaging
ARTIFACTS
DEVELOPMENT
Packages
Memory
Network
Source code
Disk
DEPLOYMENT
RUNTIME

14. SOURCE CODE
SURFACE
SLOC
# CLASSES
# PACKAGES

15. METHODS

16. CYCLOMATIC
COMPLEXITY
Number of independent execution paths

17. CYCLOMATIC
NUMBER
M = E - N + 2P
entry
WHERE
E = # Edges
N = # Nodes
P = # Exit nodes
exit
for loop

18. CYCLOMATIC
NUMBER
1
1
2
M = 5 - 5 + 2
2
4
3
2
4
3
5
5

19. CYCLOMATIC
NUMBER
1
2
SAFE
5
DANGEROUS
10
HIGHLY
DANGEROUS
CATASTROPHIC

20. TEST CODE
COVERAGE
Statement
COMPLIANCE LEVELS
Test Effectiveness Ratio - TER
TER1
Control-flow branches
TER2
Linear Code Sequence and Jump - LCSAJ
TER3

21. CLASS / MODULE

22. COUPLING
FAN-OUT
FAN-IN
Depth of inheritance
CHILDREN

23. COHESION
“
For each module in isolation, how tightly bound or related its
internal elements are to one another.
The most effectively modular system is the one for which
the sum of functional relatedness between pairs of elements
not in the same module is minimized; among other things,
this tends to minimize the required number of intermodular
connections and the amount of intermodular coupling.
Edward Yourdon & Larry L. Constantine
Structured Design

24. EQUILIBRIUM

25. FOCUS
EQUILIBRIUM
Multi-level
Quality & Planning
SEMANTICS
Key abstractions
Well defined boundaries
Clean interactions
EMBODIMENT
Visualize project state
Minimize time-boxing
Avoid isolation
Forget frameworks

26. GET INTO
FLOW
State of mind in which awareness and action become one

27. HAVE
FUN
S.M.A.R.T GOALS
SERIOUS
FUN
Challenge
Mastery
Accomplishment
CELEBRATE
Purpose
Focus
Meaning
CONTINUOUS
REINFORCEMENT
HARD
FUN

28. CRITICAL
ADVICE
PRACTICES
ARE JUST MEANS TO
ACHIEVE GOALS

29. THANK YOU!