The purpose of this paper is to improve construction project planning capabilities. As project management is a core capability in the construction industry, high quality project planning processes are necessary for project success. Methodology This study involves data collected from 555 project managers across four industries across three different countries. Project planning capabilities of construction project managers have been compared with other industrial sectors. In addition, critical project planning processes for the construction industry have been identified. Findings It has been found that, relative to other industrial sectors, organizations belonging to the construction sector obtain high quality of project planning and the highest success rate. In comparison with other sectors, schedule, quality, and procurement planning are most frequently executed in construction projects. Finally, the impact of the different planning processes on project success has also been investigated. The processes that have the greatest impact on project success in the construction sector are "activity definition" and "project plan development". However, it has been also-2-found that construction project managers do not always invest enough effort in these critical planning processes. Practical implications Construction project managers, wishing to improve project performance at the planning phase of a project, should concentrate more on the accurate identification of all project activities and on the development of a high quality project plan, which can be approved by key stakeholders. Value of paper This paper identifies the most critical planning processes in construction projects. This represents new knowledge for the construction management body of knowledge.