One building's survey pool size was determined to be ~500 out of ~1500 total occupants. Assume survey forms are to delivered to every third person passing into the elevator vestibules (the only ingress). This is the only means of ingress to tenant areas and the point where the tenant flow into the building has become homogenous, regardless of their mode of transportation (note that stairways are locked in the direction of ingress causing all occupants to pass through the lobbies). Is this a sufficiently random sample? How does one account for those telecommuting or otherwise not traveling to work under this scenario?
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Dan Ackerstein
PrincipalAckerstein Sustainability, LLC
LEEDuser Expert
819 thumbs up
September 28, 2011 - 1:00 pm
It is a viable strategy James - GBCI has approved the 'elevator survey' in this context and it works very nicely. One thing to be sure of is that you spread your survey out over an extended time period - even if you reach 500 respondents by 8am, the demographics of people arriving later could differ substantially from those arriving earlier (in a building I recently surveyed, financial folks all arrived before 7am, legal folks largely afterward - their survey responses weren't radically different, but they were noticeably so.)
The one down-side to the elevator survey is that you miss out on telecommuters. Just no good way to catch that in the survey tool.
Hope that helps a bit
Dan