Question No $2$

ASSA ABLOY SA is a company specializing in door opening solutions. One part of the company focuses on manufacturing pin tumbler and lever locks for multiple brands including Union, Yale and Multi$-$Lock. Find the Critical Path. The production line used to produce padlocks is a perfect example of a network system; the steps are shown:

$\backslash$table$[[$Activity$,$Description,$\backslash$table$[[$Immediate$],[$Predecessor$]],$Duration $($Hours$)],[$A$,$Receive raw materials,$-,0\mathrm{.}5],[$B$,$Bolt cutting,A$,1\mathrm{.}0],[$C$,$Transfer Machine $($series of drilling and cutting operations$),$B$,1\mathrm{.}5],[$D$,$Transfer Machine $($barrels$),$B$,1\mathrm{.}4],[$E$,$Barrel pinning,D$,1\mathrm{.}2],[$F$,$Shackle groove cutting,B$,0\mathrm{.}8],[$G$,$Shackle Bending,F$,1\mathrm{.}0],[$H$,$Insert shackle into body,C$,$E$,$G$,0\mathrm{.}4],[$I$,$Insert barrel into body and test key set,H$,1\mathrm{.}4],[$J$,$Packaging of padlock,I,$0\mathrm{.}5]]$

a$)$ Drawing the Project Network

b$)$ Determining early start $($ES$)$ and early finish $($EF$)$

c$)$ Determining late start $($LS$)$ and late finish $($LF$)$