79
CALCULATIONS
Management & Merchandising
Calculations
The object of CTS calculations is to
project time remaining on components to
their 100 percent worn (service point)
and/or 120 percent worn. Simply deter-
mining percent worn is only the first step.
Projecting service points allows you to
schedule downtimes, increase machine
availability and reduce the customer’s cost
per hour.
The sequence of steps to project service
points is as follows:
1. Determine percent worn (to service
point) from charts in CTS Handbook.
2. Determine hours now on parts — will
need hour meter reading during CTS
inspection and hour meter reading
when undercarriage components were
installed.
3. Determine total “potential” hours for
part to its service point by dividing hours
now (on part) by percent worn now:
Example:
500 SMU now ÷ .25 (25% worn)
= 2000 SMU
(total potential to 100% worn)
4. Determine the potential hours for the
part if it were run to 120 percent worn
by multiplying the SMU to 100 percent
worn times 1.2:
Example:
2000 SMU x 1.2 = 2400 SMU
(total potential to 120% worn)
5. Find the hours left on the part until it
would reach its total potential by sub-
tracting hours now (on part):
Example:
2000 - 500 = 1500 SMU
(remaining until 100% worn)
Example:
2400 - 500 = 1900 SMU
(remaining until 120% worn)
6. Note the part, component or system
with the lowest total potential or fewest
hours left. Calculate the time in weeks
or months until reinspection, replace-
ment or service are needed.