QC

What's needed

 * tools
 * parts

Procedure

 * 1) Ensure you have the right parts
 * 2) Case
 * 3) Motherboard
 * 4) Power supply
 * 5) CPU and accessories (heatsink, fan, radiator, etc)
 * 6) RAM
 * 7) Expansion cards (graphics cards, NICs, etc)
 * 8) drives
 * 9) internal cabling (SATA cables, IDE cables, motherboard connector cables, etc. Will depend on the mobo.)
 * 10) Case fans and accessories
 * 11) Install PSU in case
 * 12) Install drives in case
 * 13) Install mobo in case
 * 14) Install CPU and RAM in mobo
 * 15) Install CPU in slot, then paste it and install heatsink, fan, etc.
 * 16) Install expansion cards in mobo
 * 17) Connect power and i/o cables to drives
 * 18) Connect motherboard connectors to case switches
 * 19) Install case fans etc.
 * 20) Connect PSU power connector to mobo
 * 21) Boot and test