Quantcast Figure 6-5. Determining Cost Effectiveness for "Air Base Somewhere."

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AFM 91-19 / TM 5-629 / NAVFAC MO-314
24 May 1989
49
DOCUMENT D
Determination of Cost Effectiveness
Mowing Versus PGRs
PLACE: Air Base Somewhere
DATE: 08/03/84
Description of Area:
Location: Runways and Taxiways
Size: 2300 acres
Special Considerations: Includes main grassy areas-between the runways, taxiways and aprons.
Time between operations: 2 weeks
Time of year: SPRING
SUMMER
RAINY
FALL
DRY
(Circle the most appropriate)
Grass Type: COOL SEASON
WARM SEASON
(Circle the most appropriate)
Source *
8
From Table 6-2
1. EFFECTIVENESS PERIOD . . . . . . . . . . . . . . . . . . . . . .
2. NO. WEEKS BETWEEN PRESENT MOWING
2
Local estimate
OPERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
3. NO. OF MOWING OPERATIONS . . . . . . . . . . . . . . . .
(1)(2)
Document C, line 5f
$ 53,928.91
4. COST PER MOWING OPERATION . . . . . . . . . . . . . . .
$215,715.64
(3) x (4)
5. TOTAL COST DURING EFFECTIVENESS PERIOD
$107,587.82
6. SAVINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(5)(2)
Document C, line 5f
$ 49,397.33
7. COST OF SPRAYING OPERATION . . . . . . . . . . . . . .
IF LINE 6 GREATER THAN LINE 7, THEN PGR IS COST-EFFECTIVE.
$ 58,460.49
8. SAVINGS = $107,857.82 - $49,397.33 =
(LINE 6)
(LINE 7)
9. USE OF PROJECTED SAVINGS:
Cost
Project
Increase mowing on obstructed areas and fenced borders
by 3 mowings to give once a week coverage during rapid
growth season (100 acres @ $14,582.56 each mowing)
$ 43,747.68
*The figures in parentheses indicate lines of this document.
Figure 6-5. Determining Cost Effectiveness for "Air Base Somewhere."





 


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