Access requirements shrink the field
Site inductions, background requirements, escorted access and restricted zones all reduce the number of providers who can realistically service a facility. That is not a reason to lower your standards; it is a reason to establish the position early. Gathering proposals from providers who cannot clear the requirements produces a comparison that has to be discarded, usually after several weeks have passed and the arrangement you needed in place has to start again from the beginning.
Ask each provider what similar requirements they have worked under. Client names are not the point and no provider should be expected to supply them. What you want is whether the process is familiar, roughly how long it took, and whether they have staff who have already been through something comparable. Familiarity translates directly into a start date you can plan around and it is a question every capable provider can answer without hesitation.
