Architectural-"ilities"
What is an "Ility" you might ask? Well, there are all kinds of ilities in the context of software architecture. Here is a list of some of the most important, and calls out some of the ways to measure them.
Last updated
What is an "Ility" you might ask? Well, there are all kinds of ilities in the context of software architecture. Here is a list of some of the most important, and calls out some of the ways to measure them.
Last updated
Characteristic Category
Composite-ility
ility
Measure
Operational Architecture
Performance
Cumulative average response time - trigger alert when the average response times within a particular context exeeds 1400 ms)
Maximum Response Time - Trigger alert anytime max response time of selected requests exceeds 2000ms
Cumulative averge response time - trigger alert if response times continues to increase over 2 month period
Double Exponential Smoothing
Alert tuning Fitness function
Scalability
Elasticity
Quality Architecture
Reliability
Fault Tolerance
Availability
(E[uptime])/(E[uptime]+E[downtime])
Using the nines chart
Agility
Deployability
Measure & track the number of actual hours spent to deploy
Measure & track failed deployments or errors resulting from deployment
Measure & track frequency of deployment
Measure errors/failures
Modularity
Internal Quality Architecture
Component Coupling
(tight -> loose coupling)
Pathological coupling
External coupling
Control coupling
Data coupling
Abstractness
Sum (abstract elements) / sum (concrete elements)
Instability
Efferent coupling / efferent coupling / afferent coupling
Distance from the main sequence
d=|abstract+instability −1 |
Component
Modularity
Maintainability
Testability
Availability
Deployment
Reliability
Scaleability
Evolutionary/migration-ability
Complexity/WMC
Maintainability
Testability
Reliability
Coupling (CE, CA, CT)
Modularity
Maintainability
Testability
Availability
Deployment
Reliability
Scalability
Evolutionary/Migration-ability
Inheritance depth (DIT)
Modularity
Maintainability
Testability
Deployment
Reliability
Evolutionary/Migration-ability
Percent