Standards can be classified based on their nature and attainability:
- Ideal Standards (Theoretical Standards): These represent the best possible performance under perfect operating conditions, assuming no inefficiencies, waste, or idle time. They are rarely achievable in practice and can be demotivating.
- Attainable Standards (Practical Standards): These are based on efficient but realistic operating conditions, allowing for normal spoilage, downtime, and inefficiencies. They are challenging but achievable and are generally preferred for motivational purposes and control.
- Basic Standards: These are long-term standards that remain unchanged for an extended period. They are used to show trends in efficiency and cost over time but are not suitable for day-to-day control.
- Current Standards: These are standards set for the current period, reflecting current conditions and expected efficiency levels. They are revised frequently to reflect changes in prices, methods, etc., and are most suitable for control.