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True/False 11.- Though the plan becomes a benchmark against which actual progress can be compared, it does not allow for corrective action if deviations occur. 12. It is important that the people who are involved in performing the work are also involved in planning the work. 13. The WBS usually indicates the organization or individual responsible for each work item. 14. Some responsibility matrices use an 'X' to show who is responsible for each work item. 15. In the AIB format, the activity description is written above the arrow. 16. An activity cannot start until all of the preceding activities that are linked to it by arrows have been finished. 17. Activities in a ladder are not allowed because it portrays a path of activities that perpetually repeats itself. 18. Loops allow the project to be completed in the shortest possible time while making the best use of available resources