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Predicting Employee Expertise for!
Talent Management in the Enterprise
KDD2014読み会!
京都大学石井研究室 B4!
児玉 悠
Kush R. Varshney, Vijil Chenthamarakshan, Scott W. Fancher,
Jun Wang, Dongping Fang, Aleksandra Mojsilovic
概要
p IBMのIndustry paper!
!
p 変化の激しい大企業内での人材マネジメント促進のため
には最新の社員の専門領域に関するデータが必要→デー
タの生成に機械学習を用いて自動化する!
p webリソースや企業内データに対して機械学習を適用し
社員の専門領域クラスラベルを予測する!
背景
p IBM: 情報技術やそれに基づくビジネスコンサルを行う
巨大企業←全世界の社員合計は425000人!
p 情報系企業の技術革新のペースは速くなる一方!
p IBMのような巨大企業が変化の激しいトレンドを反映し
た意思決定を行うためには、正確かつ最新の各社員の専
門性に関する情報が必要!
 →機械学習を用いて情報の整理を自動化!!
機械学習での定式化
p 社員の専門領域クラスラベルの推定を教師有り分類問題
として捉える!
p ここではSales部門の社員約36000人を11クラスの専門
領域に分類することを考える!
p 使用するデータ・特徴量・アルゴリズムはどうするか?!
使用できるデータ
p 使用可能と思われるデータソースは次の4種類!
n 社員自身の仕事の説明文データ(job titleデータ)!
n 標準的な人事情報(HRデータ)!
n 各社員のプロダクトの情報→職種に依存するため用いない!
n IBMの社内SNSからのデータ!
特徴抽出
p 使用するのは基本的にテキストデータである(job title
データ、HRデータ、sales opportunity データ、社内
SNSのソーシャルタグデータ)!
p 用いる特徴量は上記データからのbag-of-words!
!
使用するアルゴリズム
p 以下4つのone-vs-restを分類器として精度を比較!
n L2正則化ロジスティック回帰!
n L1正則化ロジスティック回帰!
n SVM!
n ナイーブベイズ!
!
実験結果1
p 各アルゴリズムの比較!
p 各特徴セットの比較!
→Job Title + HR Info にロジスティック回帰を適用した場
合の精度が最も良い!
!
実験結果2
p 適合度が高いk個の推定クラスの中に正解クラスが
 入っている確率
展開と影響
p IBMは実際に今回の実験より得られた結果を用いてIBM
社員の専門領域推定システムを構築しようとしている!
p その開発と普及はまだ途上段階であるが、実現すれば手
作業による分類のコストの大幅な削減が期待できる
実際に開発したシステム画面
まとめ
p 人材マネジメントのためのデータ整理を自動化するため
に、IBMの企業データに機械学習を適用して社員の専門
領域クラスを推定した!
p job titleデータとHRデータからのbag-of-wordsにロジス
ティック回帰を用いた場合が最も精度が良かった!
p IBMでは実際にこのシステムを開発し普及させることで
コスト削減&トレンドに即した意思決定の支援を行おう
としている

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Kdd読み会2014発表資料