In an open tender process, any supplier can submit a bid, and there is no pre-qualification stage. This approach is suitable when the requirements are well-defined, and there is a sufficient number of suppliers in the market to ensure competition. However, if too many suppliers respond, it can lead to an overwhelming number of bids to evaluate. Therefore, it's essential to consider the number of potential suppliers in the market before opting for an open tender.

Exact Extract from Study Guide:

"Open procedure – used for well-specified requirements and there is no pre-qualification of bidders. Many suppliers could submit a bid, which could result in lots of bids to assess, so the open procedure is normally only used where the number of potential bidders is expected to be relatively low."