問41
頻出度★★★
三つのサブシステム A，B，C のテスト期間と要員数が次のとおりであるとき，テスト期間中に要員数の合計が最大となる月の要員は何名か。
| サブシステム | テスト期間 | 要員数 |
|---|---|---|
| A | 4月～6月 | 常時1名 |
| B | 5月～7月 | 常時2名 |
| C | 7月～8月 | 常時3名 |
平成28年度 秋期 ITパスポート試験 問41
マネジメント系プロジェクトマネジメント › プロジェクトマネジメント
This question's explanation and your answers so far.
解説
問 41
Incorrectア
“3” is the total for May or June (A+B = 3) or for August (C = 3), not the value of the month with the maximum. The question asks for the number of staff in the month where the total is largest, so this is incorrect.
Incorrectイ
There is no month whose total is “4”. The monthly totals are 1, 3, 3, 5, and 3; the value 4 never appears, so this is incorrect.
- ウ
正解 For each month, add up the number of staff for the subsystems being tested in that month. Adding A (Apr–Jun, 1 person), B (May–Jul, 2 persons), and C (Jul–Aug, 3 persons) month by month gives: April = 1, May = 3 (A+B), June = 3 (A+B), July = 5 (B+C), August = 3. The total reaches its maximum in July, where B and C overlap, giving 2 + 3 = 5 persons. Therefore the correct answer is ウ, “5”.
Incorrectエ
“6” would be the value if all three of A, B, and C were running at the same time (1+2+3), but A ends in June and C starts in July, so the three never overlap in the same month. Therefore the maximum is at most 5 persons, making this incorrect.
ここがポイント
- The approach of reading a Gantt-chart-style period table, summing the staff (resources) for each month where the periods overlap, and finding the month when the workload (number of staff) peaks.
- The key point is to accurately grasp the overlap of the test periods on a monthly basis, taking care to count both the start month and the end month.
用語