In the last week, I was working on the followings,

i) developed a set of slides for stochastic placement
ii) finished coding on SSTA considering spatial correlated variation, including
	- data structure extension
	- interface file parser
	- min, max, add, subtract extension
	- forward and backward timng graph traverse

Debugging and testing on the extended SSTA are still ongoing. Next step may be
either extension of stochastic placement or other physical synthesis such as
routing.