The World of Avlis

My character has recently decided to build an iron golem however I am unsure how to RP it (he owns the required manual). Is the physical body built over time as if it were a really big suit of armor? Is it created from the required reagents in a ritual? Could the body be constructed over time using magic alone? As I understand it right now the body is built then the ritual is preformed to animate it however I am usnure on this! Basically I am unsure how golems work on Avlis and I have been unable to find anything when I searched the wiki and the forums. Thanks for any help!