問9
頻出度★★☆
表は，ベンダ4社の提案書を管理面，技術面，価格面のそれぞれについて評価した値である。
| 評価項目 | 重み | A社 | B社 | C社 | D社 |
|---|---|---|---|---|---|
| 管理面 | 2 | 2 | 4 | 3 | 3 |
| 技術面 | 3 | 3 | 4 | 2 | 3 |
| 価格面 | 5 | 4 | 2 | 4 | 3 |
管理面，技術面，価格面の各値に重み付けをし，その合計が最高点のベンダを調達先に選定するとき，選定されるベンダはどれか。
平成27年度 秋期 ITパスポート試験 問9
ストラテジ系システム企画 › 調達計画・実施
This question's explanation and your answers so far.
解説
問 9
- ア
正解 This problem compares vendors using a weighted sum, obtained by multiplying each evaluation value by its evaluation item's weight and adding them up. The weights are 2 for the management aspect, 3 for the technical aspect, and 5 for the price aspect. Company A: 2×2＋3×3＋5×4＝4＋9＋20＝33; Company B: 2×4＋3×4＋5×2＝8＋12＋10＝30; Company C: 2×3＋3×2＋5×4＝6＋6＋20＝32; Company D: 2×3＋3×3＋5×3＝6＋9＋15＝30. The totals are 33 for Company A, 30 for Company B, 32 for Company C, and 30 for Company D, so the highest score is Company A's 33 points. Therefore the vendor selected as the procurement source is Company A, and the correct answer is “ア”.
Incorrectイ
Company B's weighted total is 2×4＋3×4＋5×2＝30 points. Although its management and technical evaluations are high, the price aspect, which has the largest weight (5), is only 2, so the total does not grow enough to reach Company A's 33 points.
Incorrectウ
Company C's weighted total is 2×3＋3×2＋5×4＝32 points. Its price aspect (weight 5) is a high 4, approaching Company A, but because its technical aspect is only 2, it falls short by 1 point and does not reach the highest score.
Incorrectエ
Company D's weighted total is 2×3＋3×3＋5×3＝30 points. All items are an even 3, but there is no standout high evaluation, so it is inferior to Company A, which scored 4 on the price aspect with weight 5, and does not reach the highest score.
ここがポイント
- Calculating a weighted sum (weighted total): multiply each evaluation value by the weight of its evaluation item, and compare the totals. A high evaluation on an item with a large weight (here, the price aspect's weight of 5) has a big impact on the total.
- A basic method for vendor selection and procurement-source evaluation. The idea is to take the proposals submitted by multiple vendors in response to an RFP (Request For Proposal), weight them by evaluation item, score them quantitatively, and choose the vendor with the highest score.
用語