In the case study of hospital maintenance, a scenario where during the maintenance of the hospital's HVAC system, worker discovers that several newly installed air ducts were of incorrect size and the installation was also not accurate. This issue leads to inefficient airflow and temperature irregularity within the critical areas of the hospital, including ICU wards and operation rooms. This resulted in the patient discomfort and increased the risk of any airborne diseases that could have spread throughout the facility. The quality issue here is the failure to compliance and adherence to the precise specifications and standards during the installation process. The quality control measures taken were not appropriate leading to this rework occurrence. Health and safety concerns: 1. low air quality- 2. Temperature variation 3. Increased energy consumption Provide your recommendations (three points for each OHS concern) for managing the quality aspects that might arise from OHS issues that might occur in your maintenance works at the project site