Examples

• Allow for unattended traffic control
• Human: more expensive, boredom factor
• Roundabout: less space, more control
• May be sequenced in a ring road
• May take into account external events, such as a rail crossing nearby

• Emergency services - some lights resettible
• Type and size of lights
• Appropriate settings for traffic volumes (at different times)
• Contingency planning
  On failure - flash red

Climate Control Systems Inc.(CCS) , Fertigation Manager® is a fertilizer injection system that allows growers of flowers, vegetables,fruit trees, nursery crops, and field crops to achieve higher levels of profitability by increasing crop quality and yields, while decreasing labour, fertilizer and water cost.

• Manage lots of variables, including; time, temperature, humidity and sunshine.
• unattended 24hr control
• Record keeping

• Position of sensors (eg temperature sensor in shade)
• Contingency planning
  On failure - close/open vents ?, auto reset on power on
• continuous printed output - ribbon/dot matrix (fades rather than empties)

• Launching a rocket, sensors can shut down launch up to almost the last second.
• Gyroscopic balance correction in guidance.
• Accuracy
• Remote control since destroyed at the end
• 24 hour availability
• Moral issues for humans

• Parallelism - needs to monitor weight of fuel left vs crosswind effects.
• Aerodynamics
• Range
• Abort features