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.
The answer often is due to a phenomena known as Merge Bias, or Nodal Bias, and is a feature that has no equivalent in Cost Risk analysis. It is unique to schedules due to the logical relationships between activities.xample. Consider the following example of a single activity driving a completion milestone, the activity (and whole project) most likely duration is 100days, there is minimum duration of 80days, and a maximum of 120 days.