278 Handbook of SCADA/Control Systems Security
Once the vendors have submitted their proposals, an objective comparison of the
proposals is next. The denitions in the specication are important to make an accu-
rate comparison. The vendors should be requested to specically point out when
they take exception to the bid specication. Their exceptions may be valid and worth
considering for the eventual design. Vendors may have different methods for pricing
a project. As an example, one vendor may price their system based on the number
of actual eld devices. Another vendor may price on internal computer points sup-
plied from the eld device. There are many more internal computer points for a eld
device than actual eld devices. With this d