Which of the following might necessitate retraining related to fall protection systems?

Retraining related to fall protection systems may be necessary when there are inadequacies in an employee's knowledge or use of the systems. This highlights the importance of ensuring that employees not only understand the theoretical aspects of fall protection but can also apply this knowledge effectively in real work scenarios. If gaps in understanding or application are identified, it is crucial to provide additional training to reinforce safe practices, thereby mitigating the risk of falls, which are one of the leading causes of injuries in the construction industry.

While an increased employee count might prompt a review of training needs, it does not directly indicate that existing employees need retraining. Similarly, annual safety audits may lead to improvements in safety protocols but do not inherently require retraining unless specific deficiencies are found. The introduction of new team leaders could necessitate discussions around procedures and leadership, but it doesn't directly correlate to the need for existing employees to retrain on their current knowledge and application of fall protection systems. Therefore, the focus on inadequacies in knowledge or use is the most compelling reason for requiring retraining in this context.