Sales Headcount & Capacity Planning tools model the sales organization's staffing needs — forecasting how many reps, managers, and specialists are needed to achieve revenue targets based on productivity assumptions, ramp curves, and attrition rates. Core capabilities include sales capacity modeling, ramp curve modeling, productivity-based headcount planning, attrition and backfill forecasting, hiring timeline alignment, and integration with Finance FP&A, HR, and CRM systems. The category spans dedicated sales planning platforms (Fullcast, Xactly Forecasting) and planning modules within broader SPM and revenue operations suites.