A Pre-qualification Questionnaire (PQQ) is a document organizations use to pre-screen potential suppliers or contractors before inviting them to participate in a tender process. The PQQ aims to assess the supplier's suitability and capability to meet the organization's requirements and determine whether they should be invited to participate in the tender process.

The PQQ typically includes a range of questions that evaluate the supplier's experience, qualifications, financial stability, health and safety record, and other factors relevant to the project or procurement. The questions may be scored, and the suppliers are typically required to provide evidence to support their responses.

The PQQ process allows organizations to streamline the tender process by ensuring that only qualified and capable suppliers are invited to participate. It also helps to reduce the risk of awarding contracts to suppliers who may not have the necessary skills or resources to deliver the project successfully.

The PQQ process is commonly used in public sector procurement, where it may be required by law or regulation. However, it is also used by private sector organizations as a best practice to ensure that they select the most suitable and capable suppliers for their projects.