LDP Credos v2

Lifion Development Platform Credos
v2Team Autonomy: but cross platform goals aligned with our customers
Production Ready:
● Designed: accounting for broader implications of tech additions
● Secure: from inside out
● Maintainable: as simple as possible, but not simpler
● Performant: we pride ourselves with the performance of our platform
● Cost efficient: all teams take cost of operations at high priority
© 2018 ADP, LLC All Rights Reserved.

Team
Autonomy

Lifion Platform Credos
Agile Coordination
Team
Autonomy
Just Enough
Governance
We trust our teams to practice autonomous workstream governance
But, we are conscientious of shared operations governance

Individuals and interactions over processes and tools
Customer collaboration over contract negotiation
Responding to change over following a plan
"While there is value in the items on the right, we value the items on the left more." http://agilemanifesto.org/)
Coordination
Just Enough
Governance
Team
Autonomy Agile

Agile Coordination
Just Enough
Governance
Teams collaborate and share commons solutions
Workstreams ensure low coordination overhead
Management strives to achieve alignment without excessive control
Team
Autonomy

Production Ready

Stability
& Reliability
Production
Readiness Automation
Automated software factory:
Automated Testing
Quality Gates
Immutable infrastructure
Canary deployments
Fault
Tolerant

Stability
& Reliability
Production
Regular functional testing
Regular performance testing
Regular load testing
Regular chaos testing
Fault
Tolerant

Production
Built for data integrity and rapid fault recovery
No single points of failure
Timely failure detection & remediation
Regular resiliency testing
Fault
Tolerant
Stability
& Reliability

Common Design

Evolutionary
Best Practice
Patterns
Common
Design
Architectural
Principles
Each service delivers a single and complete capability
Services can run independently
Platform needs to be geared towards handling large data
payloads
Prefer small bounded context service boundary
Workstreams evaluate currently used technologies and pick the
most appropriate for their needs

Evolutionary
Best Practice
Patterns
Common
Design
Architectural
Principles
Single Responsibility Principle(SRP)
Asynchronous over synchronous communication
No cross context (service) boundary direct database access
Loose coupling; minimize cross-domain dependencies
Monitoring and instrumentation

Evolutionary
Best Practice
Patterns
Common
Design
Architectural
Principles
Build to evolve
Backward compatible, versioned
Managed Deprecations

Secure

Continuous
Compliance
Secure Preventive &
Defensive
Preventive: to stop threats before they start
Defensive: to detect & react
Defense in
depth

Continuous
Compliance
Secure Preventive &
Defensive
We are aware of domestic and international compliance regulations.
We are very careful with:
How services communicate with one another
How we handle data at rest and in transit
How we handle personally identifiable information (PII)
Defense in
depth

Secure Preventive &
Defensive
Principle of least privilege
Automatic security updates
Latest stable versions of external dependencies
Code securely from the ground up
Continuous
Compliance
Defense in
depth

Maintainable

Use the
available
tools/libs
Prevent
Overengineering
Design for
Simplicity
Avoid unnecessary
complexity
We value the quality of being easy to understand or do:
“Make the change easy, then make the easy change”
But: Simple != Easy

Use the
available
tools/libs
Prevent
Overengineering
Design for
Simplicity
Avoid unnecessary
complexity
Clarify and challenge stakeholder’s requirements
Avoid code that solves problems you don’t have
Don’t build more than is necessary

Prevent
Overengineering
Design for
Simplicity
Avoid unnecessary
complexity
We don’t build if it exists
We invest in finding commonly used tools, libraries
We try to contribute commonly used tools, libraries
When failures happen, we drive the conversation away from
faults in the technologies we use
Use the
available
tools/libs

Performant

We use standard logging formats
We support multi level logging
Allow to change the logging level dynamically
We use asynchronous logging
Commit &
Deliver
Measure &
analyze
Focus on
Performance
Log performance
related data

Commit &
Deliver
Measure &
analyze
Focus on
Performance
Log performance
related data
Ensuring that the system remains healthy
Monitor availability of the system and its components
We make logs searchable and utilize them as insight into
our code
We use base lines for reference
© 2018 ADP, LLC All Rights Reserved.© 2018 ADP, LLC All Rights Reserved.

Commit &
Deliver
Measure &
analyze
Focus on
Performance
Log performance
related data
Commit to performance by establishing SLAs that can be depended
on by consumers
We commit to service to service SLAs for:
Uptime requirements
Response Times
Average and peak requests per sec/min

Cost efficient

Minimize
resource usage
Cost
Efficient
Cost of operating
our services
We maintain full awareness of the cost of operating their services
We choose appropriate Cloud billing model
We use dynamic scaling and on demand resource provisioning
Cost
Monitoring

Minimize
resource usage
Cost
Efficient
Cost of operating
our services
We design our services for minimal resource consumption
We timely remove unused services
We regularly prune data stores
We use local developers workstations
Cost
Monitoring

Cost
Efficient
Cost of operating
our services
We monitor costs utilizing Platform dashboard
We set up billing alerts
Minimize
resource usage
Cost
Monitoring

Production Ready Secure
Simple
Performant
Cost efficient
=
Designed
Lifion Development Platform

Some inspiration for self improvement

Some inspiration for self improvement link

Some inspiration for services not sharing data

"Don't push elephants around"
"Perfection is achieved, not when there is
nothing more to add, but when there's nothing
left to take away"
–Saint-Exupery

LDP Credos v2

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LDP Credos v2