What are the benefits of job descriptions, and how can they prove to be detrimental?

Which job$($s$)$ do you believe most need job descriptions $($i$.$e$.,$ Level $5$ executive managers to Level $1$ semiskilled workers$)?$ What's the difference between a job analysis and a job description?

Which choice did your teammates make for the Special Decision $($job analysis$)$ in the simulation? Do you agree or disagree?