Start with the supplier material you really receive
Ergonode has an XLS/XLSX importer with saved mapping profiles. It expects attributes to exist already and creates new simple products, while updating all supported product types. That is a useful starting point for repeatable, structured supplier files. Lasso is worth testing when the work also involves extracting mixed documents, normalizing values, and researching missing specifications before accepting a batch. Compare the preparation your team performs before an import and the corrections left afterward. A successful spreadsheet upload is only one part of onboarding.
Source 2