Write short notes on the following:

$($a$)$ Matrix organization structure

$($b$)$ 'Authority', 'responsibility', and 'delegation'

$($c$)$ ABC inventory analysis

$($d$)$ Type I and Type II errors

$($e$)$ Process focus

$($f$)$ Repetitive focus

$($g$)$ Graphical method of scheduling

$($h$)$ Quantity discount in inventory management

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