Data Interpretation: Time-based DI

Concept Explanation

Time-based DI tracks values across months, quarters, or years. Focus on trends, period totals, and period-to-period change.

Key Formulas

• Period total = sum over the time range.
• YoY change = this year − last year (same period).
• QoQ growth = (current quarter − previous) ÷ previous × 100.
• CAGR concept: compare start and end values over equal intervals.

Example

Q1 = 100, Q2 = 120. QoQ growth = (20/100) × 100 = 20%.

Common Trap

Quarter labels must align (Q1 2021 vs Q1 2020 for YoY, not Q1 vs Q2).