SUMMARY
Although project scope definition is regarded as a key element in successful project management, research on the subject is sparse. This paper investigates the relationship between project scope readiness and project performance in the Namibian mining industry. A survey was done on ten projects from seven Namibian mining companies, using the project definition readiness index (PDRI) tool as a scope definition indicator, while cost and schedule performance were used as performance indicators. Support was found for the proposition that readiness of project scope definition improves schedule performance, but the relationship between the PDRI score and cost performance was less conclusive.