What is the volume of productivity over what sort of timeline that might signify a.) a reasonable performance; b) a positive step-change for a professor in your discipline?
An average of one article in a highly regarded or leading international journal per year would be a high end norm in a research intensive university, but it would vary depending on the sub-disciplinary area and the other research outputs achieved. Productivity tends to be higher for marketing academics working in technical and quantitative sub-areas of the field on multi-authored papers. Qualitative work tends to take longer re. ethnographies etc.