The vat log has smashed rows, the same batch twice, a one-off 900 °C spike, empty pH cells, and a column of worker names. Which preprocessing activities map to those defects?

Smashed rows, the same batch twice, a one-off 900 C spike, empty pH cells, and a column of worker names are cleaning work. Remove defects, duplicates, and outliers, impute missing values, and anonymize or drop personal data. Worker names are not an informative feature to keep.