MBSE with CORE 100821

Recognizing All States of Your System

stm _Exhibit Geospatial Library States

Turn On

Turn Off

Idle

Shutting Down

Shutdown Confirmed

entry/Broadcast Shutting Down

Startup

after 30 seconds /

Display Timed Out Status

Initializing

[init ok]

entry/Broadcast Initializing Status

System OK

[init not ok]

Shutdown / Confirm Shutdown Request

Maintenance

Operating

at 2 AM GMT on first Sunday of each month

entry/Broadcast Operational Status do/Operate Library exit/Disable Request Portal

entry/Broadcast Maintenance Status do/Perform Library Maintenance

301

Key Semantics of State Transition Diagrams

• States

• Shown as rounded rectangles • Indicate state name plus

• entry – functions invoked when state entered • exit – functions invoked when state left • do – functions (preferably root function) executed while in the state

• Transitions

• Lines connecting states • Reflect valid transition paths

302

MBSE with CORE