Hardie plank siding is a premium brand of cement board siding (also known as fiber cement board siding) produced by the James Hardie Company.ardie plank can be purchased with a wood-grain look, a plain smooth look or a stucco type finish. Hardie plank also comes in simulated cedar shingle planks.
activity duration. Period (hours, days, weeks) required to complete an activity. Activities with zero duration are called milestones.
2) A critical activity is an activity which, if not completed on time, will delay the entire project. 3) The critical path is the sequence of critical activities from project start to project finish that determine the shortest project duration. SHORT DESCRIPTION.