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Valve Seats Dataset

Source: R/data.R
valveSeats.Rd

Valve seats wear out in certain diesel engines, each with 16 valve seats. The dataset served as an example of recurrence data in Nelson (1995), which consists of valve-seat replacements on 41 engines in a fleet. The covariates are named ID, Days, and No., where

  • ID: The engine number;

  • Days: Engine age in days;

  • No.: Event indicator, '1' for a valve-seat replacement and, '0' for the censoring age of an engine.

Format

A data frame with 89 rows and 3 variables.

References

Nelson, W. (1995), Confidence Limits for Recurrence Data-Applied to Cost or Number of Product Repairs, Technometrics, 37, 147--157.