' s ▁processes . ▁ ▁Change ▁control ▁is ▁the ▁procedures ▁used ▁to ▁ensure ▁that ▁changes ▁( norm ally , ▁but ▁not ▁necessarily , ▁to ▁IT ▁systems ) ▁are ▁introduced ▁in ▁a ▁controlled ▁and ▁coordin ated ▁manner . ▁Change ▁control ▁is ▁a ▁major ▁aspect ▁of ▁the ▁bro ader ▁discipline ▁of ▁change ▁management . ▁ ▁Change ▁management ▁is ▁a ▁field ▁of ▁management ▁focused ▁on ▁organiz ational ▁changes . ▁It ▁a ims ▁to ▁ensure ▁that ▁methods ▁and ▁procedures ▁are ▁used ▁for ▁efficient ▁and ▁prompt ▁handling ▁of ▁all ▁changes ▁to ▁controlled ▁IT ▁infrastr ucture , ▁in ▁order ▁to ▁minim ize ▁the ▁number ▁and ▁impact ▁of ▁any ▁related ▁inc idents ▁upon ▁service . ▁ ▁Case ▁study ▁is ▁a ▁research ▁method ▁which ▁involves ▁an ▁in - depth , ▁longitud inal ▁exam ination ▁of ▁a ▁single ▁instance ▁or ▁event : ▁a ▁case . ▁They ▁provide ▁a ▁system atic ▁way ▁of ▁looking ▁at ▁events , ▁collect ing ▁data , ▁analyz ing ▁information , ▁and ▁reporting ▁the ▁results . ▁ ▁Cert ified ▁Associ ate ▁in ▁Project ▁Management ▁is ▁an ▁entry - level ▁cert ification ▁for ▁project ▁pract ition ers ▁offered ▁by ▁Project ▁Management ▁Institute . ▁ ▁Communic ations ▁log ▁is ▁an ▁on going ▁documentation ▁of ▁communication ▁events ▁between ▁any ▁identified ▁project ▁st ake hold ers , ▁managed ▁and ▁collected ▁by ▁the ▁project ▁manager ▁that ▁describes : ▁the ▁sender ▁and ▁receiver ▁of ▁the ▁communication ▁event ; ▁where , ▁when ▁and ▁for ▁how ▁long ▁the ▁communication ▁event ▁el apsed ; ▁in ▁what ▁form ▁the ▁communication ▁event ▁took ▁place ; ▁a ▁summary ▁of ▁what ▁information