Bottom up estimates $($You may select more than one answer. Single click the box with the question mark to produce a check mark for a correct answer and double click the box with the question mark to empty the box for a wrong answer. Any boxes left with a question mark will be automatically graded as incorrect.$)$

are made by people familiar with the task

help to gain buy$-$in on the validity of the estimate

improve the accuracy of the estimate

should be preferred if e timating cost is reasonable

$?$ are used in the project conceptual phase

$?$ depend on surrogate measures such as weight or square feet or ratios

$?$ do not consider individual activity issues and problems

$?$ are good for rough estimates

$?$ can help select and prioritize projects