DSS Use Cases
Use Case for Pressure Factor Calculations
Definitions
A - total allocated time [hrs]
O - total observed time [hrs]
f - fractional observed time = 1 - O/A
d - done time [hrs]
r - residue time [hrs]
n - total time = d + r [hrs]
pf - pressure factor = 1 + ln(n/d)
X-band Case
We have a total of 100 hours allocated over a year for X-band from 3 sessions. About 80% of the time is used.
- Sessions
- Tom: 40 hrs starting in 6A
- Dick: 30 hrs starting in 6B
- Harry: 30 hrs starting in 6C
- Periods
- Tom
- 5 hrs at 2006 03 24 0 0 0
- 12 hrs at 2006 04 10 0 0 0
- 4 hrs at 2006 06 12 0 0 0
- 1 hrs at 2006 11 11 0 0 0
- Dick
- 14 hrs at 2006 07 14 0 0 0
- 15 hrs at 2006 11 11 0 0 0
- Harry
- 10 hrs at 2006 11 11 0 0 0
- 7 hrs at 2006 12 10 0 0 0
- 12 hrs at 2006 12 25 0 0 0
Time |
A |
O |
f |
d |
r |
n |
pf |
2006 02 01 0 0 0 |
100 |
0 |
1.0 |
0 |
40 |
40 |
4.69 |
2006 03 25 0 0 0 |
100 |
5 |
0.95 |
5 |
35 |
40 |
3.08 |
2006 04 11 0 0 0 |
100 |
17 |
0.83 |
17 |
23 |
40 |
1.86 |
|
|
|
|
|
|
|
|
2006 06 01 0 0 0 |
100 |
17 |
0.83 |
0 |
53 |
53 |
4.97 |
2006 06 13 0 0 0 |
100 |
21 |
0.79 |
4 |
49 |
53 |
3.58 |
2006 07 15 0 0 0 |
100 |
35 |
0.65 |
18 |
35 |
53 |
2.08 |
|
|
|
|
|
|
|
|
2006 10 01 0 0 0 |
100 |
35 |
0.65 |
0 |
65 |
65 |
5.17 |
2006 11 12 0 0 0 |
100 |
61 |
0.39 |
26 |
39 |
65 |
1.92 |
2006 12 11 0 0 0 |
100 |
68 |
0.32 |
33 |
32 |
65 |
1.68 |
2006 12 26 0 0 0 |
100 |
80 |
0.20 |
45 |
20 |
65 |
1.37 |
Ka-band Case
We have a total of 200 hours allocated over the year for Ka-band in three session. About 40% of the time is used.
- Sessions
- Tom: 80 hrs at Ka-band starting in 6A
- Dick: 60 hrs at Ka-band starting in 6B
- Harry: 60 hrs at Ka-band starting in 6C
- Periods
- Tom
- 5 hrs at 2006 03 24 0 0 0
- 12 hrs at 2006 04 10 0 0 0
- 4 hrs at 2006 06 12 0 0 0
- 1 hrs at 2006 11 11 0 0 0
- Dick
- 14 hrs at 2006 07 14 0 0 0
- 15 hrs at 2006 11 11 0 0 0
- Harry
- 10 hrs at 2006 11 11 0 0 0
- 7 hrs at 2006 12 10 0 0 0
- 12 hrs at 2006 12 25 0 0 0
Time |
A |
O |
f |
d |
r |
n |
pf |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
2006 12 26 0 0 0 |
200 |
80 |
0.600 |
45 |
120 |
165 |
2.30 |
2006 04 11 0 0 0 |
200 |
17 |
0.915 |
17 |
63 |
80 |
2.55 |
2006 12 11 0 0 0 |
200 |
68 |
0.660 |
33 |
132 |
165 |
2.61 |
2006 11 12 0 0 0 |
200 |
61 |
0.695 |
26 |
139 |
165 |
2.85 |
2006 07 15 0 0 0 |
200 |
35 |
0.825 |
18 |
105 |
123 |
2.92 |
2006 03 25 0 0 0 |
200 |
5 |
0.975 |
5 |
75 |
80 |
3.77 |
2006 06 13 0 0 0 |
200 |
21 |
0.895 |
4 |
119 |
123 |
4.43 |
2006 02 01 0 0 0 |
200 |
0 |
1.0 |
0 |
80 |
80 |
5.38 |
2006 06 01 0 0 0 |
200 |
17 |
0.915 |
0 |
123 |
123 |
5.81 |
2006 10 01 0 0 0 |
200 |
35 |
0.825 |
0 |
165 |
165 |
6.10 |
--
DanaBalser - 2010-09-07