There are several techniques that businesses can use for scheduling in production planning, including:

1. Gantt charts: Gantt charts are visual representations of a production schedule, with each activity represented as a bar on the chart. Gantt charts can be used to identify dependencies between activities, and to ensure that each activity is completed in the correct order.
2. Critical Path Method (CPM): CPM is a scheduling technique that is used to identify the critical path of a production process. The critical path is the sequence of activities that must be completed in a specific order to ensure that the production process is completed on time. CPM can be used to identify potential delays in the production process and to develop strategies to mitigate these delays.
3. Program Evaluation and Review Technique (PERT): PERT is a scheduling technique that is similar to CPM, but is designed to account for uncertainty in the duration of each production activity. PERT uses statistical analysis to estimate the time required for each activity, and to identify the critical path of the production process.
4. Resource leveling: Resource leveling is a scheduling technique that is used to ensure that resources are allocated efficiently throughout the production process. This involves balancing the workload of different resources to ensure that no resource is over- or under-utilized.
5. Finite capacity scheduling: Finite capacity scheduling is a technique that is used to ensure that production activities are scheduled in a way that maximizes the use of available resources. This technique takes into account the capacity constraints of each resource, and ensures that production activities are scheduled in a way that makes the most efficient use of these resources.
6. Just-In-Time (JIT) scheduling: JIT scheduling is a technique that is used to minimize inventory costs by scheduling production activities to ensure that materials and components are delivered just in time for production. This can help to reduce waste and improve efficiency, but requires careful coordination between suppliers and production teams.

These are just a few of the scheduling techniques that businesses can use in production planning. The specific techniques used will depend on a variety of factors, including the nature of the business, the resources available, and the production process itself.