補助情報を用いたプロセス平均監視のための改良型DEWMA型管理図
Saadia Masood1, Khawar Ibrar1, Zabihullah Movaheedi2
1Department of Statistics, PMAS-University of Arid Agriculture Rawalpindi, Rawalpindi, Pakistan.
Scientific reports
|December 15, 2025
まとめ
本研究では、回帰ベース二重指数移動平均(MRDEWMA)管理図を導入します。新しい管理図は、従来の管理図と比較して小さなプロセス平均シフトを効果的に検出し、品質管理を強化します。
科学分野:
- 産業工学
- 統計的品質管理
- プロセス監視
背景:
- 統計的プロセス管理(SPC)は、プロセス監視を通じた製品品質にとって重要です。
- 管理図は、プロセス変動を管理するための主要なツールです。
- 既存の管理図は、補助情報を統合することによって改善できます。
研究 の 目的:
- 新しい回帰ベースDEWMA(MRDEWMA)管理図を提案すること。
- 回帰を介して補助変数を組み込むことにより、プロセス平均監視を強化すること。
- MRDEWMA管理図の性能を評価すること。
主な方法:
- プロセス平均の回帰推定を用いたMRDEWMA管理図を開発しました。
- 時間変化および漸近的条件を考慮して管理限界を設定しました。
- モンテカルロシミュレーションを通じてランレングス特性(ARL、SDRL、MRL)を評価しました。
主要な成果:
- MRDEWMA管理図は、小から中程度のプロセス平均シフトの検出において優れた性能を示しました。
- 比較分析により、提案された管理図が従来のDEWMA管理図を上回ることが示されました。
- シミュレーションと実際のケーススタディにより、管理図の有効性が検証されました。
結論:
- MRDEWMA管理図は、プロセス平均監視のための感度を向上させます。
- 回帰を介して補助変数を統合することは、SPCの有効性を高めます。
- 提案された方法は、産業品質改善のための貴重なツールを提供します。
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