2.2 HR Metrics, Technology & Recordkeeping

2.2 HR Metrics, Technology & Recordkeeping

Metrics let HR speak the organization's language — money, time, and risk. The aPHR exam expects you to recognize the standard formulas and apply them to simple scenarios.

Core HR Metrics and Formulas

Turnover rate measures how many employees leave over a period:

Turnover % = (number of separations during the period ÷ average number of employees during the period) × 100

If a 200-person department loses 30 people in a year, turnover is (30 ÷ 200) × 100 = 15%. Always separate voluntary turnover (resignations) from involuntary turnover (layoffs, terminations) — they signal very different problems.

Cost-per-hire captures the investment to fill a role:

Cost-per-hire = (total internal recruiting costs + total external recruiting costs) ÷ total number of hires

Time-to-fill is the calendar days from when a requisition is approved to when the offer is accepted; time-to-hire is the shorter span from when a specific candidate enters the pipeline to acceptance. These are easy to confuse and a frequent distractor pair.

Distinguish leading indicators (predictive — e.g., engagement scores, application volume) from lagging indicators (historical outcomes — e.g., turnover, absenteeism). A metric is a single measure; a KPI (Key Performance Indicator) is a metric tied to a strategic goal.

Two higher-level concepts round out the set. Human capital ROI estimates the financial return the organization gets per dollar of pay and benefits invested in people. HR-to-employee ratio (number of HR staff per 100 employees) gauges how leanly the function is staffed; smaller, mature organizations often run leaner ratios. A benchmark is an external comparison point — comparing your turnover or cost-per-hire against industry data tells you whether a number is good or bad. A raw number without context means little, which is why the exam favors answers that emphasize comparison and trend over a single snapshot.

Quantitative vs. Qualitative Data

Quantitative data is numeric and countable (headcount, turnover %, salaries). Qualitative data is descriptive and interpretive (exit-interview themes, engagement-survey comments). Strong HR analysis blends both: the turnover rate tells you how many left, while exit-interview themes tell you why.

HR Technology and the HRIS

An HRIS (Human Resource Information System) is the central database for employee data — personal information, pay, benefits, time, and performance. It supports self-service (employees update addresses or enroll in benefits directly) and manager self-service (approving leave, viewing team data). Modern platforms extend the HRIS into an HCM (Human Capital Management) suite or an ATS (Applicant Tracking System) for recruiting and an LMS (Learning Management System) for training.

The exam emphasizes that an HRIS is only as valuable as its data integrity and security. Access must follow a need-to-know basis, with role-based permissions so a recruiter cannot see medical records and a manager cannot see another team's pay.

Know these technology terms for the exam:

A key benefit of an HRIS is automation of routine transactions, which frees HR for higher-value work, and reporting that turns stored data into the metrics above. The risks are data-entry errors (garbage in, garbage out) and security breaches of sensitive personal information.

Recordkeeping and Retention

U.S. law sets minimum retention periods. Memorize these high-frequency rules:

• Form I-9 (employment eligibility): keep for 3 years after the date of hire OR 1 year after termination, whichever is LATER.
• Job applications, resumes, EEO records, most personnel records: generally 1 year (2 years for federal contractors).
• Payroll records (FLSA): 3 years; supporting wage-computation records 2 years.
• Benefits / ERISA plan records: 6 years.
• OSHA 300 injury logs: 5 years following the year they cover.
• Tax records (IRS): 4 years after the tax is due or paid.

Confidentiality and Privacy

Medical information must be stored in a separate, locked file apart from the general personnel file (an ADA requirement). Information that identifies disability, genetic data (protected by GINA, the Genetic Information Nondiscrimination Act), or workers' compensation must be restricted. I-9 forms are also best kept separate from personnel files so they can be produced for audit without exposing other records.

A practical retention principle: when records are subject to a litigation hold or government investigation, the employer must preserve them even if the routine retention period has lapsed. Destroying records on a normal schedule during active litigation can constitute spoliation.

Common trap: the I-9 retention rule. Many candidates pick "3 years after hire" alone — but the correct standard is the later of 3 years after hire or 1 year after termination, so a long-tenured employee's I-9 may need to be kept far longer than three calendar years.