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Estimating Project Completion Times

Updated: Jan 13, 2019

To accurately estimate installation times, A.I.N. looks at the number, the size and the elevations of the pieces to be installed as well as other situations that have effects on install times.

1. Piece Counts are a major component in determining completion times. Pieces = time.

2. Over-sized Pieces (>1500 require proportionally more time.

3. Wall Substrate. Installing into concrete & other hard surfaces about doubles the time.

4. Installed Elevation. When requiring a ladder, the higher the piece, the longer the time.

5. Design Issues. Incomplete, inaccurate or inaccessible floor plans slow an installer by an average of 25%. This includes additional time spent as a designer's "assistant".

6. "Moving Day". When an installer is vying for space with other contractors, an average of 30% more time will be required to complete the project.

7. Hardware. Attached inconsistently (not installed via template), the placements of hardware can add up to a minute per piece. When the hardware requires reattachment, it can add up to 2 minutes more.

8. The Setting. Senior living facilities are less likely to have a loading dock. Military bases are less likely to have the crate in the same building. The concentration of art to wall space is highest in office settings and apartment social areas. Larger facility require more walking.

9. Unpredictables. Defined as "not project related", includes over-active fire alarms, under-active elevators, emergencies and issues not directly related to the scope of a project. (Is it fair to charge art providers for these issues? We don't think so.)


In an average sized facility, without the delays associated with drilling into concrete, hanging at high elevations, managing over-sized pieces, assisting a designer, or working around other contractors, with the pieces found in a crate in the receiving, with the installer working independently to unpack, stage, inventory shipping damages, install and clean up afterwards, a proficient professional will hang about 5 security pieces per hour (averaging 13 minutes per piece) and 6-7 hooked pieces per hour (averaging 9 minutes per piece.)


1. Piece Count: Consider the installation of 100 security pieces, with "best case" scenarios and no complications:

Time = # of total pieces * 13 minutes. In this case, 100 * 13 minutes = 1300 mins = +/- 22 hours.

2. Wall Substrate: Consider those 100 pieces, and 30 are in concrete.

Time = (# of total pieces x 13 minutes)+(# in concrete x 13 minutes). In this case, (100 * 13 minutes) + (30 * 13 minutes) = 1690 = +/- 28 hrs.

3. Over-sized Pieces: Of the 100 piece, 10 are 60”x 40” & 30 are 48” x 48”.

# normal + # over-size1 (H1xW1/1500) + # oversize2(H2xW2/1500)*13. In this case, 60 + 10(60”x40”/1500") + 30(48”x48”/1500") x 13min= (+/- 26 hrs)

4. Piece Height: The formula uses coefficients to address the effects of height and the type of ladder on an install's completion time. (It's complex and infrequent . . . enough said about it here.)

5. Design Issues. Those 100 pieces without predetermined heights or placement.

Time = (# of total pieces + 25%) x 13 minutes. In this case, (100 + 25) x 13 = 1625 minutes = +/- 27 hours.

6. MOVING DAY (Too Many Other Contractors): Same 100 pieces, but with other contractors present.

Time = # of total pieces + 30% * 13 minute. In this case, (100 +30) * 13 minutes = 1690 minutes = +/- 28 hours.

7. Hardware Attachment: Of the 100 pieces, 6 need hardware attached.

Time = (# of total pieces x 13 minutes) + (# Retrofitted x 5 minutes). In this case, (100 x 13 mins.) + (6 x 5) = 1330 mins. = +/- 23 hours.

8. Facility Size: A formula correlating time & facility size hasn't been found.

9. Unpredictables: We don’t charge clients for delays unrelated to their project.


A 100 piece project, without any complications: 100 pieces x 13 minutes = 1300 minutes = +/- 22 hours.

But 100 pieces with all of the variable listed above, we’d see:  (60 normal pieces + 10 into concrete )+ 10 over-size1 x (60”x40”/1500) + 30 over-

size2 x (48”x48”/1500) + {100 tot. pieces x 25%design coefficient} + (100 total pieces x 30% construction coefficient) * 13 minutes + 30 minutes (hardware) = +/- 41 hours.

(Given a proficient installer, these equations are quite accurate.)


Depending on the variables, the time needed to complete a project can vary dramatically. Art Installer Network uses the above formulas as part of its everyday pricing program. It assures consistency to clients & fair pay to installers. AIN charges $1/minute. It's that simple!

Experience Logical Pricing At Art Installer Network.

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