Come  up  with  what  you  feel  is  a  reasonable  delay factor and discuss it with your chain of command. You are  not  bound  by  either  the  delay  factors  or  the production  rates  in  the  P-405.  To  figure,  man-day estimates, you can use your experience to determe the logical production rates to use. Keep in mind that the delay factor is  only used to determine the man-day estimate for a particular construction activity. Each activity will have a different delay factor. All other calculations  use  the  availability  factor. Availability  Factors Availability factors take into account that Seabees assigned  as  direct  labor  are  not  available  100  percent of the time. The 2nd/3rd Naval Construction Brigade provides  the  availability  factors  for  planning purposes.  Availability  factors  are  sometimes  still referred to as site efficiency factors. These factors vary between  0.75  for  mainbody  sites  to  0.85  for  detail sites. Using the following equation, you can determine the man-day capability (MC) for the main body and each detail. MC  = DL x WD  x ME  x AF Use  DL  to  represent  the  number  of  direct labor  assigned,  WD  for  the  number  of  available workdays, ME for the length of the workday divided by 8 (9/8 = 1.125), and AF is the availability factor. Multiply  these  four  factors  to  figure  the  man-day capability.  You  can  use  this  same  equation  to determine the direct labor manning for a detail if you substitute tasked man-days for MC and plug in AF, ME, and WD. The number of work days is taken from the  deployment  calendar. Construction  Activity  Durations The MC equation also can be used to determine construction activity durations. By substituting MD estimated  for  MC,  plugging  in  crew  size  (CS)  for direct labor assigned (DL), availability factor (AF), and man-day equivalent (ME), you can solve for the number  of  workdays  required  or  project  duration. Duration  = MD estimated  ÷ CS ÷ AF ÷ ME The activity duration is increased by including the availability factor to account for time lost from the project site. The actual crew you would expect to see on  the  jobsite  on  the  average  day  would  be  the assigned crew multiplied by the availability factor. Always  use  the  availability  factor. If in the drywall example you had a crew of 12 assigned, how long would it take to complete this task (availability factor 0.75, man-day equivalent 1.125)? Remember to use the revised man-day estimate. which . includes  the  delay  factor. Using the formula: Duration  = 70 ÷ 12 ÷ 0.75 ÷ 1.125 = 6.91 or 7. CONSTRUCTION  ACTIVITY SUMMARY (CAS) SHEETS Once  the  master  activities  have  been  broken  into construction  activities,  you  will  need  to  use  a  CAS sheet (figs. 2-9 and 2-10) for each activity. In addition to the activity description and scheduled dates, all the required resources are shown on the front. Safety and QC requirements are on the back. The space at the bottom of the back page should be used for man-day and  duration  calculations. The CAS sheets should be able to stand alone. The CAS   sheets   should   contain   all   of   your   notes, information,  and  calculations  pertaining  to  man-days, durations, tools, and equipment. This way, if you are not available, someone else can use this information and the project can continue. It is very important that CAS sheets be filled out correctly. Almost all of your remaining planning is driven from the CAS sheets. Always  use  a  pencil  to  fill  them  out,  because  they change  constantly. CONSTRUCTION  SCHEDULING You   must   put   together   realistic,   workable schedules  during  your  project’s  planning  and estimating stages if you hope to finish the tasking on schedule during the deployment. Crucial to a workable schedule is the proper, logical sequence of activities and  good  realistic  durations.  Performing  the  forward and backward pass will identify the critical path. The critical path gives you a list of milestones (activity completion  dates)  that  must  be  met.  If  these  milestones are met, the project will be on track and finished by the  scheduled  completion  date. LEVEL II ROUGHS As   the   construction   schedule   unfolds,   a commitment  of  resources  (labor  and  equipment)  from 2-12