Project control and reporting: At the detailed (operational) level of project control, which paired questions are primarily answered to keep work on track?

Introduction / Context:
Project control translates plans into actionable schedules and budgets, then monitors progress against those baselines. At a detailed level, managers focus on timing and resource consumption to ensure deliverables are achieved without scope, schedule, or cost overruns.

Given Data / Assumptions:

• The question emphasizes detailed project control, not high-level governance.
• Common artifacts include Gantt charts, earned value metrics, and cost reports.
• We must select the pair of questions that operational control most directly addresses.

Concept / Approach:
Daily or weekly control cycles revolve around schedule and cost. “When?” aligns with start/finish dates and milestones. “How much?” maps to effort hours, quantities, and costs (budget vs actual). These two dimensions underpin techniques such as earned value management (EVM), where schedule variance and cost variance quantify performance.

Step-by-Step Solution:

Verification / Alternative check:
Standard PMBOK-aligned control processes emphasize schedule control and cost control, answering whether work is on time and within budget.

Why Other Options Are Wrong:

• Who and why? Diagnostic questions, not primary tracking metrics.
• When and where? “Where” is relevant for logistics but not central to control KPIs.
• Who and when? Missing cost/effort dimension.

Common Pitfalls:
Overemphasizing narrative explanations (“why”) before establishing the quantitative status (schedule/cost); tracking dates without monitoring burn rate.

Final Answer:
when and how much?