Planners make up schedules. Frightened coders strive to make schedules. Real programmers ignore schedules. Like vending machine popcorn. Coders pop it in the microwave oven.
Real programmers use the heat given off by the cpu.
They can tell what job is running just by listening to the rate of popping. Know every nuance of every instruction and use them all in every read program. Puppy architects won't allow execute instructions to address another execute as the target instruction. Real programers despise such petty restrictions. Don't bring brown bag lunches to work.