We are pursuing LEED NC 2009. We are designing a call centre office building which will be operated 24 hours on three consecutive 8 hours shift work. The total building users in one shift is 3090 persons with No transients, visitors or residents in the building. Please note that consecutive shift would not start until the previous shift finishes.
When we attempt to calculate the FTE and Daily occupancy – things get extremely confusing, How do we determine this in this case? Can someone help me in this calculation
Is shift overlap should be considered for calculating the required number of Bike racks, changing rooms and showers, and if yes do we count the entire second shift or just a percentage of it ???? (Remember that no overlap in work time, but maybe second shift employees reach building before earlier shift employees leave,,, suppose they arrive with bikes)
Does anyone have similar experience with such complex occupancy projects.
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Susan Walter
HDRLEEDuser Expert
1299 thumbs up
March 13, 2012 - 9:20 am
Assuming that for each shift all employees are working 8 hours, then your daily FTE is 3 * 3,090 = 9,270. Total peak shift is the overlap between the two highest shifts. So if the day and afternoon shift have more people in them than the evening shift then use the day and afternoon shift for the peak calculation. Yes, you will have to add more bike racks to the project but you may not have to add more showers (try a narrative explaining people shower after their ride).
Diaa Madkour
Architect39 thumbs up
March 14, 2012 - 3:38 am
Susan. thanks for your reply, we still have a problem that we discovered the call center office will be working 7 days a week, how would that affect the calculations? regarding that FTE defined as working hours 40 hours a week.
Susan Walter
HDRLEEDuser Expert
1299 thumbs up
March 14, 2012 - 8:47 am
Divide the number of hours in a week by 40 hours to get the number of FTEs. If this is an anticipated figure (if we build it, they will come) then use it but also explain how you arrived at your figures in the preliminary forms.
It helps to create a small spreadsheet.
Steven Er
11 thumbs up
May 11, 2012 - 12:10 am
Hi Susan, i agree with your interpretations on FTE determination based on sum of all shift employees in a multiple shifts case.
LEED BDC reference guide, page 53 states "In buildings with multiple shifts, use only the highest-volume shift in the calculation but consider shift overlap when determining peak building use". LEED online PI Form 3, under complex occupancy states "FTE is FTE during the regularly occurring moment with highest volume of full-time and part-time occupants".
Both of this statement confusing the determination of FTE in a multiple shifts case. What is your interpretation on this?
Anna Korinkova
Grinity s.r.o.83 thumbs up
October 25, 2012 - 3:41 am
I am not sure if Suzan is correct. According her estimation you would design bicycle racks for 9,720 employees but that is not correct. The peak situation will be when two shifts are changing and therefore you need to design the bicycle racks for 2 x 3,090.
LEED reference guide, page 53 states "buildings with multiple shifts, use only the highest-volume shift in the calculation but consider shift overlap when determining peak building use". From my understanding, you would take only one shift with the highest volume for FTE calculation (but with overlap with second shift).
For water calculation, you will have to consider different estimation though.
What do you think?
Elke Malleier
Dr.Sustainability & Green Building Consultant
10 thumbs up
March 6, 2013 - 4:54 am
For me, this sounds quite reasonable concerning SSc4.2.
In PIf3 the definition for 'Total building users at peak moment' says
"Equals the sum of occupants and transients during the regularly occurring moment with the highest volume of total users."