the act of killing one's father, mother, or other close relative. 2. a person who commits such an act.
Slack time is a very integral part of the project process and it must be clearly shown on the PERT chart. Ignoring slack time can lead to consequences that may compromise the overall performance and efficiency of the project.
1 O 'clock is an abbreviation of of the clock.  In times past clocks were relatively rare. Most people told time by some reference to the position of the sun or moon. The times provided by these two bodies do not always concur with those provided by a clock. Hence there was a need to differentiate between the time provided of the clock (o'clock) and the time used by the vast majority of people in a given locality.