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Gaskin and Associates Consulting Group, LLC
Discovery STEM proposal
October 8 2026
23
Appendix C Charges and calculation rules
Historical equipment and material charges
Work order
Labor hours
Equipment
Material
Combined
524724 signs
24.5
$198.25
$2,201.62
$2,399.87
524913 16th/Chestnut
15.0
$736.70
$1,374.44
$2,111.14
524914 17th/Chestnut
9.0
$442.02
$922.27
$1,364.29
Total cited orders
48.5
$1,376.97
$4,498.33
$5,875.30
The totals add the three reported work-order categories once. Combined means equipment plus
material only. Recorded labor hours have no dollar valuation here. The line-painting comments report
3,243 ft and 2,175 ft respectively; these are marking-work quantities, not crossing distances or street
lengths. [R03-R05]
Initial review allowance
Engineering 60 x $150 = $9,000; field/data 80 x $45 = $3,600; school planning 40 x $45 = $1,800;
specialist review 16 x $150 = $2,400; materials/communication $1,000. Direct total = $17,800.
Reserve = $17,800 x 0.15 = $2,670. Initial scenario = $20,470. Hours total 60 + 80 + 40 + 16 = 196.
All quantities and rates are author assumptions.
Observation effort assumption
Normal-day windows total 75 + 45 + 50 = 170 minutes. Ten baseline/follow-up days x 170 minutes x
two observers / 60 = 56.67 observer hours. The 80-hour allowance leaves 23.33 hours for planning,
coding and validation. Additional approaches, extended windows, unusual schedules or repeated
observation can require more effort.
Metrics and cost rules
Conflict rate = classified events / observed child crossing movements x 100. Unapproved unloading
rate = unapproved family unloading movements / all observed family unloading movements x 100.
Duty coverage = actual covered required minutes / total required minutes x 100. Define all
denominators before use; zero or missing exposure does not produce a valid rate.
Before/after change is the follow-up value less the comparable baseline value. Report raw counts and
absolute changes when a relative percentage is undefined or misleading. Separate incremental cash
from gross resources; existing staff time is not costless. No modeled safety improvement, injury
reduction, avoided cost, enforcement revenue or saving is asserted.Jump to an indexed page (28 of 28)