Complex sentence: Critics said that several staff members were dismissed on grounds of "redundancy", while similar posts were advertised, and the grounds for dismissal were based on counting of the number of papers published and on the impact factor of the journal in which the papers appeared.
Split into simpler sentences: Critics said that several staff members were dismissed on grounds of "redundancy", while similar posts were advertised. The grounds for dismissal were based on counting of the number of papers published and on the impact factor of the journal in which the papers appeared.