Ch3. Recruiting and Selection — Workforce Planning and Selection Tools

Workforce Planning

Purpose:
Have the right people in the right roles at the right time
Avoid both understaffing and overstaffing

Demand Forecasting:
Managerial judgment
Statistical methods (trend analysis, regression)
Workload analysis

Supply Forecasting:
Internal supply: promotions and transfers (Markov analysis)
External supply:  labor market conditions

Responding to Imbalances:
Shortage: Hire externally, increase overtime, outsource
Surplus:  Attrition, voluntary separation packages, layoffs (WARN Act notice required)

Recruitment

Internal Recruiting:
Internal job postings, promotions, transfers
Pros: Boosts morale, cost-effective, proven performers
Cons: Internal competition, limited fresh perspectives

External Recruiting:
Open postings, executive search firms (headhunters),
campus recruiting, LinkedIn and social media
Pros: Fresh perspectives, diversity, new skill sets
Cons: Higher cost and time, longer onboarding curve

Employer Branding:
EVP (Employee Value Proposition)
Employer brand marketing
Social recruiting

Selection Tools

Validity:
Does the tool measure what it is supposed to measure?
Content validity · Criterion-related (predictive) validity · Construct validity

Reliability:
Does the tool produce consistent results under the same conditions?
Test-retest · Internal consistency (Cronbach's alpha)

Common Selection Tools:
Resume / Application screening: Education, experience, credentials
Written tests: Cognitive ability, personality assessments
Interviews: Structured, unstructured, panel
Background and reference checks
Physical / medical examinations (post-offer, job-related only per ADA)

Interview Types

Structured Interview:
Predetermined questions asked consistently to all candidates
Standardized scoring rubric
Highest reliability and predictive validity
Required for legal defensibility under EEOC guidelines

Unstructured Interview:
Open-ended conversation
Allows deeper exploration
High risk of interviewer bias

Situational Interview:
Presents a hypothetical scenario: "What would you do if…?"
Predicts future behavior based on stated intentions

Behavioral Event Interview (BEI):
Asks about real past experiences: "Tell me about a time when…"
STAR method: Situation → Task → Action → Result
Past behavior is the best predictor of future behavior

Key Concept Cards

Validity = Measures the Right Thing ★★★★★ : How well the selection tool measures what it is intended to measure. Memory tip: Validity = right measurement

Reliability = Consistency ★★★★★ : Produces the same result when repeated under the same conditions. Memory tip: Reliability = consistency

Structured Interview = High Reliability and Validity ★★★★☆ : Standardized questions and scoring reduce interviewer bias. Memory tip: Structured = standardized

Practice Quiz

Q. What is the relationship between validity and reliability?

Reliability is a necessary but not sufficient condition for validity. Without reliability (consistency), you cannot have validity (accuracy). However, a tool can be reliable without being valid — for example, a scale that consistently reads 5 lbs too heavy is reliable but not valid for measuring true weight. For selection tools, you need both: reliability (scores are consistent) and predictive validity (scores actually predict on-the-job performance).

Q. Why does Behavioral Event Interviewing (BEI) have higher predictive validity than conventional interviewing?

Past behavior is the strongest predictor of future behavior. BEI collects actual evidence (“I did X”) rather than hypothetical statements (“I would do X”), making it harder for candidates to fabricate responses. The STAR format ensures structured, comparable data across all candidates. Research consistently shows higher correlations between BEI scores and subsequent job performance. Additionally, standardization reduces interviewer bias and strengthens legal defensibility under equal employment opportunity law.