Propose-Specific Information Related to Prediction Level at x and Mean Magnitude of Relative Error: A Case Study of Software Effort Estimation

Hoc Huynh Thai, Petr Silhavy (), Martin Fajkus, Zdenka Prokopova and Radek Silhavy
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Hoc Huynh Thai: Faculty of Applied Informatics, Tomas Bata University in Zlin, Nad Stranemi 4511, 76001 Zlin, Czech Republic
Petr Silhavy: Faculty of Applied Informatics, Tomas Bata University in Zlin, Nad Stranemi 4511, 76001 Zlin, Czech Republic
Martin Fajkus: Faculty of Applied Informatics, Tomas Bata University in Zlin, Nad Stranemi 4511, 76001 Zlin, Czech Republic
Zdenka Prokopova: Faculty of Applied Informatics, Tomas Bata University in Zlin, Nad Stranemi 4511, 76001 Zlin, Czech Republic
Radek Silhavy: Faculty of Applied Informatics, Tomas Bata University in Zlin, Nad Stranemi 4511, 76001 Zlin, Czech Republic

Mathematics, 2022, vol. 10, issue 24, 1-14

Abstract: The prediction level at x ( P R E D ( x ) ) and mean magnitude of relative error ( M M R E ) are measured based on the magnitude of relative error between real and predicted values. They are the standard metrics that evaluate accurate effort estimates. However, these values might not reveal the magnitude of over-/under-estimation. This study aims to define additional information associated with the P R E D ( x ) and M M R E to help practitioners better interpret those values. We propose the formulas associated with the P R E D ( x ) and M M R E to express the level of scatters of predictive values versus actual values on the left ( s i g L e f t ), on the right ( s i g R i g h t ), and on the mean of the scatters ( s i g ). We depict the benefit of the formulas with three use case points datasets. The proposed formulas might contribute to enriching the value of the P R E D ( x ) and M M R E in validating the effort estimation.

Keywords: mean magnitude of relative error; prediction level at x; sig; software effort estimation (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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