| Append | Overwrite |
Part identifiers should not contain any commas or semi-colons. All other characters should be fine.
You can paste excel data into the text area to import it, or type data in manually. Failure and suspension data can be imported separately or together. If importing failure or suspension data only with "Import Failures" and "Import Suspensions", it must be at least single column data with the part time in the first column. For example:
| 500 |
| 550 |
If importing failure and suspension data together with "Import All", it must be at least two columns wide with a non-blank second column indicating the failed data. For example:
| 100 | |
| 200 | Y |
| 300 | |
| 400 | Failed |
If manually typing data to import, rather than using the Part Data fields, use a space to separate the columns if importing failure and suspension data and a linebreak (Enter key) between each part. For example:
| 100 |
| 200 Y |
| 300 |
| 400 failed |
Weibull parameters entered must be provided in terms of hours / cycles for the characteristic life (η), and the standard non-dimensional slope parameter (β).
Lognormal parameters entered must be provided in terms of hours / cycles (non-logarithmic space) for the mean (μ), and in natural logarithmic space for the standard deviation (σ).
To convert a standard deviation in normal time / cycle space to natural logarithmic space, simply take the natural logarithm:
| σ | = | ln(σtime/cycle) |
To convert a standard deviation in Log base 10 space to natural logarithmic space, convert as follows:
| σ | = | ln(10σlog10) |