Outlier correction with a median method

US8185347B2 · kind B2 · utility

Assignee

• SAP AG · DE

Inventors

• Ralph Moessner · Berghausen, DE
• Stefan Theis · Frankfurt, DE

Key dates

• Filing date: Dec 23, 2004
• Grant date: May 22, 2012
• Expiry date: Mar 2, 2032

Classification

• Technology area (CPC G): Physics
• CPC primary: G06Q10/10
• WIPO field: IT methods for management
• WIPO sector: Electrical engineering

Abstract

A method and apparatus, including computer program products, for determining characteristic parameters on the basis of a series of m values, H_1, H_2, . . . , H_m, over time. The values are descriptive for a predetermined process, and the series has linear characteristics. Differences, denoted as Δ_i, between pairs of values of points of the historical time series, the points having a predetermined time distance to each other, denoted as p are computed. The median value, denoted as Δ_i_M, of the computed differences Δ_i is determined. On the basis of the determined median value Δ_i_M, a trend parameter, denoted as T, T being defined as T=Δ_1_M/p is computed.