Final answer:
Dave Hitz's upset over NetApp's layoffs is most closely associated with the managerial function of Control where the company measures profitability and initiates cost reduction by downsizing.
Step-by-step explanation:
The layoff decision made by Dave Hitz at NetApp appears to fall under the managerial function of Control, specifically when it comes to measuring profitability and taking action to reduce costs. Layoffs are typically a response to a company's need to cut expenses and realign its workforce with its financial targets.
The decision to downsize does not inherently imply issues with planning, leading, or organizing, although these functions can be related to the conditions necessitating a layoff.