Final answer:
Typically, the optimal goal for instructors is to achieve 100% mastery among participants for instruction to be considered complete. However, acceptable mastery rates such as 75% or 80% may vary based on program objectives and the nature of the skill being taught.
Step-by-step explanation:
The question about when teaching systems and routines to a group of people and the percentage needed to master the skill to consider instruction complete does not have a definitive answer in the context of a statistical probability or a standardized requirement. Instead, the completion rate may be subjective and can depend on the objectives of the instruction program and the criticality of all members mastering the skill.
In many educational or business settings, it is often expected that 100% of participants master the instructional content to ensure consistency and effectiveness, especially if the skills are critical for safety or fundamental operations. However, in practice, an instruction might be considered successful at a lower threshold—such as 75% or 80%—if the skill can still be adequately performed by the group collectively, or if there are opportunities for ongoing training and support for those who require additional time to master the skills.
In summary, while some may argue that a lower percentage such as 75% or 80% may be acceptable, the optimal goal for most instructors would be to strive for 100% mastery among all participants to consider the instruction truly complete.aa