More staff required. If a business relies mainly on part-time staff, they will need to have more of them to cover operating hours. This can lead to recruitment issues.
2. More staff overlap. Even the best rota system can lead to overstaffing. This is especially true if staff are part-time, and can mean that businesses are left with unnecessarily overlapping shifts and the extra costs that come with it.
3. Difficulty with training and development of staff. Due to the fact that part-time staff spend less time at work, they often have less time to participate in training or develop their skills. This can lead to a weaker and less productive workforce.