arc42 Quality Model
161 quality attributes, explained.
104 examples of quality requirements.

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Protect Data by Establishing Security Protocols

  • #secure
  • #safe
  • #reliable

Reliable Backup and Restore

  • #safe
  • #reliable

Reliable ERH System

  • #safe

Unavailable for max 2 minutes

  • #reliable
  • #usable

Restore Filter after Log In

  • #usable
  • #suitable

Parallel Data Modification

  • #usable
  • #efficient
  • #secure

Display Data Based on Context

  • #usable
  • #suitable

Access Control via SSO

  • #usable
  • #suitable
  • #secure

Recognize Assistive Technologies

  • #usable

Multilinguality Support

  • #usable

Inclusive User Testing

  • #usable

Cultural Sensitivity in Content

  • #usable

Accessible User Interface

  • #usable

Local Explainability

  • #suitable
  • #safe
  • #reliable

Global Explainability

  • #suitable
  • #safe
  • #reliable

Precision of vehicle's orientation

  • #reliable

New users learn to find articles on their own

  • #usable

Minimize jitter in real-time data streaming

  • #reliable

Rollout of a new feature

  • #operable
  • #suitable

Efficient save function

  • #efficient

Vehicle's position validity influences accuracy

  • #reliable
  • #usable

Convenient online banking

  • #usable
  • #suitable

Compliance with WCA accessibility guidelines

  • #usable

Low change-failure rate

  • #reliable

Budget constrained library update

  • #efficient
  • #suitable

Assess impact of proposed change

  • #suitable
  • #reliable

Appearance of mobile UI

  • #usable

Affordable CRM (customer relationship management)

  • #efficient
  • #suitable

Withstand DDoS Attack

  • #reliable

Handle sudden increase in traffic

  • #reliable

Scale up in 2 Minutes

  • #efficient
  • #reliable

Reduce energy consumption with every new version

  • #efficient

Access control is enforced

  • #secure
  • #suitable

Save at least 20% of carbon emissions with every new version

  • #efficient

Authenticity of a digital document

  • #secure
  • #suitable

Detailed audit log

  • #secure
  • #suitable

User tries to achieve primary function

  • #usable

Up to date API

  • #reliable
  • #suitable

Keep data on error

  • #reliable
  • #usable

Independent replacement of subsystem

  • #flexible
  • #operable
  • #efficient

System runs offline

  • #reliable
  • #operable

Order queue

  • #reliable

Fast startup time (less than 90 sec)

  • #efficient

Fast deployment

  • #reliable
  • #operable

Easy UI

  • #usable

Add new product under 60 minutes

  • #suitable
  • #efficient
  • #reliable

Good code readability score

  • #reliable

Data Throughput for Visual Test System

  • #efficient
  • #usable

Configurable UI theme

  • #flexible
  • #usable

Clarity in technical documentation

  • #usable
  • #reliable

Accurate estimate of insurance contract rate

  • #usable
  • #suitable

Vulnerability

  • #secure
  • #reliable

Versatility

  • #flexible
  • #suitable

User interface aesthetics

  • #usable

User experience

  • #usable

User error protection

  • #usable
  • #operable

User engagement

  • #usable

User assistance

  • #usable

Usability

  • #usable
  • #operable

Upgradeability

  • #flexible
  • #operable

Understandability

  • #usable
  • #operable

Transparency

  • #reliable

Traceability

  • #reliable
  • #operable

Timeliness

  • #efficient

Time to Market

  • #efficient

Time behaviour

  • #efficient

Throughput

  • #efficient

Testability

  • #suitable
  • #flexible

Test Coverage

  • #suitable
  • #flexible

Sustainability

  • #efficient
  • #reliable

Suitability

  • #usable
  • #reliable
  • #suitable

Startup Time

  • #efficient

Standard Compliance

  • #secure
  • #safe
  • #usable
  • #reliable
  • #efficient
  • #suitable

Stability

  • #reliable

Speed

  • #efficient

Speed to Market

  • #efficient

Simplicity

  • #efficient
  • #usable

Self-descriptiveness

  • #usable

Self-containedness

  • #flexible

Security

  • #secure
  • #reliable

Securability

  • #secure

Scalability

  • #flexible

Safety

  • #safe
  • #reliable
  • #secure

Safe integration

  • #safe
  • #reliable

Robustness

  • #reliable

Risk identification

  • #safe
  • #reliable

Reusability

  • #flexible

Responsiveness

  • #usable
  • #efficient

Response Time

  • #efficient

Resource utilization

  • #efficient

Resource efficiency

  • #efficient

Resistance

  • #secure

Resilience

  • #reliable
  • #secure

Reproducibility

  • #usable

Replaceability

  • #operable
  • #flexible

Reliability

  • #reliable

Releasability

  • #operable
  • #efficient

Recovery time

  • #reliable

Recoverability

  • #reliable
  • #usable

Readability

  • #usable

Profitability

  • #efficient

Privacy

  • #secure

Predictability

  • #reliable

Precision

  • #reliable
  • #usable

Preciseness

  • #reliable
  • #usable

Portability

  • #flexible
  • #operable

Personalization

  • #flexible

Performance

  • #efficient

Patient Safety

  • #safe
  • #reliable
  • #secure

Operational and Environment Requirements

  • #operable

Operational constraint

  • #safe
  • #reliable

Operability

  • #usable
  • #operable

Observability

  • #operable

Non-repudiation

  • #secure

Modularity

  • #flexible

Modifiability

  • #flexible

Memory usage

  • #efficient

Mean time to recovery

  • #operable
  • #suitable

Mean time between failures

  • #operable

Maintainability

  • #flexible

Loose Coupling

  • #efficient
  • #flexible
  • #suitable

Longevity

  • #reliable
  • #flexible

Localizability

  • #flexible
  • #usable

Legibility

  • #usable

Legal Requirements

  • #usable
  • #operable

Learnability

  • #usable
  • #operable

Lead time for changes

  • #operable

Latency

  • #efficient
  • #usable
  • #operable

Jitter

  • #efficient

Intrusion Prevention

  • #secure

Intrusion Detection

  • #secure

Interoperability

  • #usable
  • #operable

Internationalization

  • #flexible
  • #usable

Interaction capability

  • #usable
  • #operable

Integrity

  • #secure

Installability

  • #operable
  • #flexible

Information Security

  • #secure
  • #reliable

Independence

  • #flexible

Inclusivity

  • #usable

Immunity

  • #secure
  • #reliable

i18n (Internationalization)

  • #usable

High availability

  • #reliable
  • #usable

Hazard warning

  • #safe
  • #reliable

Graceful degradation

  • #reliable
  • #usable

Functionality

  • #usable
  • #reliable
  • #suitable

Functional suitability

  • #usable
  • #reliable
  • #suitable

Functional correctness

  • #usable
  • #reliable
  • #suitable

Functional completeness

  • #usable
  • #reliable
  • #suitable

Functional Appropriateness

  • #usable
  • #reliable
  • #suitable

Flexibility

  • #flexible

Features

  • #usable

Faultlessness

  • #reliable
  • #usable
  • #secure

Fault tolerance

  • #reliable
  • #usable

Fault isolation

  • #safe
  • #reliable

Fail safe

  • #safe
  • #reliable

Extensibility

  • #flexible

Explainability

  • #safe
  • #suitable

Expected physical environment

  • #suitable
  • #operable

Energy Efficiency

  • #efficient

Elasticity

  • #flexible

Efficiency

  • #efficient

Effectiveness

  • #efficient

Ease of Use

  • #operable
  • #usable

Devops-Metrics

  • #operable

Deployment frequency

  • #operable
  • #suitable

Deployability

  • #operable
  • #suitable

Dependability

  • #reliable

DORA Metrics

  • #operable

Cycle time

  • #operable
  • #suitable
  • #efficient

Cyber Security

  • #secure

Customizability

  • #flexible
  • #usable

Credibility

  • #reliable

Cost

  • #suitable
  • #efficient

Correctness

  • #usable
  • #reliable
  • #suitable

Convenience

  • #usable

Controllability

  • #usable
  • #operable

Consistency

  • #usable
  • #efficient

Configurability

  • #flexible
  • #usable

Confidentiality

  • #secure

Conciseness

  • #usable
  • #efficient

Composability

  • #flexible

Compliance

  • #secure
  • #safe
  • #usable
  • #reliable
  • #efficient
  • #suitable

Compatibility

  • #usable
  • #operable
  • #reliable

Communicability

  • #usable

Cohesion

  • #efficient
  • #flexible
  • #suitable

Coherence

  • #usable
  • #efficient

Code Readability

  • #usable
  • #efficient

Code Complexity

  • #efficient

Co-existence

  • #flexible

Clarity

  • #usable
  • #reliable

Changeability

  • #flexible

Change failure rate

  • #operable

Carbon Emission Efficiency

  • #efficient

Capacity

  • #efficient
  • #reliable

Budget constraint

  • #suitable
  • #efficient

Backward compatibility

  • #usable
  • #operable
  • #reliable

Availability

  • #reliable
  • #usable

Autonomy

  • #operable
  • #suitable

Authenticity

  • #secure

Auditability

  • #operable

Attractiveness

  • #usable

Appropriateness recognizability

  • #usable
  • #operable

Appearance

  • #usable

Anticipated Workplace Environment

  • #usable

Analysability

  • #flexible

Agility

  • #flexible

Affordability

  • #suitable
  • #usable
  • #efficient

Adaptability

  • #flexible
  • #usable

Accuracy

  • #reliable
  • #usable

Accountability

  • #secure

Accessibility

  • #usable

Access Control

  • #secure

Modular System for Data Analysis

  • #efficient
  • #flexible

Usable Despite Color Blindness

  • #usable

Compliance with UI styleguide

  • #usable

Expressive error messages

  • #usable

Interruptable backend process

  • #usable

Detect inconsistent user input

  • #usable
  • #reliable

Consistent keyboard shortcuts

  • #usable
  • #efficient

User Interface can be used in Current Browsers

  • #flexible
  • #usable
  • #operable

Usable With Gloves

  • #usable

Usable on Factory Floor

  • #usable

Access find function in three seconds

  • #usable

Response time for image rendering

  • #efficient

Near instant search results

  • #usable
  • #efficient

Easily understandable acceptance test cases

  • #usable
  • #suitable
  • #efficient

Test with path coverage in 30min

  • #suitable

Employee attempts to modify pay rate

  • #secure

Every data modification is logged

  • #secure

Only authenticated users can access data

  • #secure

Zero-knowledge data storage

  • #secure

Encrypted storage

  • #secure

Confidentiality by multi-tenancy

  • #secure

Backup patient monitoring sensor takes over

  • #safe

Severe errors are detected and the system shuts down into safe state

  • #operable
  • #safe
  • #reliable

Server fails, system continues to operate without downtime

  • #reliable

System can run >12h without re-booting the operating system

  • #operable
  • #reliable

Restored to fully functional state 12h after complete failure

  • #operable
  • #usable
  • #reliable

Available 7x24 with 99% uptime

  • #operable
  • #usable
  • #reliable

Precise calculation of gamma coefficient

  • #reliable

Quick unit tests

  • #operable

Low effort deployment

  • #operable

Interoperable with Java 12

  • #operable

Compatible with 5 different battery providers

  • #flexible

Localizable to several languages

  • #flexible

Easily change cloud provider

  • #flexible

Core functions can be used on multiple OSs

  • #flexible
  • #usable
  • #operable

Independent enhancement of subsystem

  • #efficient
  • #flexible

Portable Business Data Checker

  • #flexible
  • #operable

Capacity to process 1000 sensor inputs per minute

  • #efficient

Respond to 15000 requests per workday

  • #efficient

Restricted Memory

  • #efficient

Low impact diagnosis

  • #efficient

Efficient generation of test data

  • #efficient
  • #suitable

Fast creation of sales report

  • #efficient

Fast rollout of changes

  • #efficient
  • #operable

Quickly locate bugs

  • #efficient

Easily understandable generated code

  • #efficient
  • #usable
  • #suitable

Maintainable checking strategies

  • #efficient

Efficient update of annual accounting report

  • #efficient
  • #flexible

Fast and accurate sensor

  • #efficient
  • #reliable

Low-overhead query execution measurement

  • #efficient

Efficient change of business rules

  • #flexible
  • #efficient

Avoid common vulnerabilities

  • #reliable
  • #secure

New Features Introduce No Bugs

  • #reliable


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