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Given a:
Set of jobs, each with an
earliest begin time,
latest finish time,
processing time, and load,

Decide:
When each job should be started so that the total load in process at any instant is minimized.
The loads could be amount of electricity used by various appliances, e.g., dishwasher, hot water heater, iron.
We want to find when to run each appliance so maximum electricity used at any instant is minimized.