In phased construction, all design is completed before construction begins foundation design always exactly considers the completely designed structure above building execution typically takes longer than in sequential construction building design may not be complete before construction begins a design/bid/build process is typically followed

giant impact theory - the moon was formed from the collision between earth and another mars-sized body.

colliding planetesimals hypothesis - the moon was formed from the same cloud of material as earth.

capture hypothesis - the moon was locked into orbit by earths gravity as it was passing by it.

accretion hypothesis - the moon was formed from collisions and combining of planetesimals.

i think this is right, if not and you know better let me know.

haile selassie i was the emperor of ethiopia from 1930-1974