Expectations VS. Reality : A new Software Project (After all designs and requirements are clear and fixed.)

EXPECTATIONS:
Day 1: Create workspace, Configure tools
Day 2: Implement high priority Feature
Day 3: Write UT and peer review
Day 4: Push first feature to Prod.

REALITY:
Day 1: Create workspace, Setup configurations
Day 2: Still setting up configurations
Week 1: Almost done setting up configurations
Week 2: New migrations issue, again reconfigure before coding starts
Week 3: Take a vacation
Month 2: Finally things are working but God knows what was the issue...