Chapter 19 — Teaching Notes

Labor Management: Scheduling, Labor Cost Control, Overtime, and the Balancing Act of Staffing

This is a build chapter. It replaces Chapter 4's planning assumption (\$252,000 fixed + 16.0% of sales) with a position-by-position staffing model, and it lands somewhere the plan did not want it to land. Teach it as a demonstration of what happens when you make an assumption specific.

Time: two 75-minute sessions, or one three-hour block with a break. Do not attempt it in a single 50 minutes; the arithmetic in §19.4 and §19.8 needs room.

Common misconceptions students bring in

1. "Labor cost means what we pay people." The single most common error, and it is worth 4.8 points of sales at Bellwether. Payroll taxes, workers' compensation, and benefits are real money and they are invisible on a schedule. Open with this — write "labor = wages" on the board and take it apart.

2. "Lower labor percentage is better." Students arrive believing labor management is a minimization problem. It is a matching problem: the right hours in the right places against a forecast. Case Study 2 exists entirely to break this belief and should be assigned before the second session.

3. "A bad daypart should be closed." Sunday brunch at 48.5% labor looks indefensible until you compute contribution. Students will reliably vote to close it. Let them, then run the numbers.

4. "Labor scales with covers." The staircase in Figure 19.5 is genuinely counterintuitive. Students expect a slope and are surprised that a 112-cover Friday can be worse than a 108-cover one.

5. "The manager on the floor controls labor cost." They control perhaps 4.5 hours a service. The person who wrote the schedule eleven days earlier controlled the other ninety.

6. "Overtime costs time and a half." It costs about 75% more than the scheduled hour at a lower rate that would have prevented it, and the premium carries taxes and workers' compensation too.

The hardest point to teach

Section 19.8's ramp arithmetic — why weeks 14–52 must run 30.2–30.3% when the plan's headline is 32.3%.

Students lose the thread because it requires holding four things at once: annual prime-cost dollars, Q1 prime-cost dollars, a COGS assumption, and the fact that the remainder falls on a smaller sales base. Teach it exclusively in dollars, never in percentages, until the last step. The moment you convert to percentages mid-derivation, half the room is lost.

Board sequence that works:

  ANNUAL PRIME BUDGET      $930,900     ← this is a pot of money
  Q1 SPENDS                $241,825     ← 66.6% of $363,100
  ─────────────────────────────────
  LEFT FOR WEEKS 14-52     $689,075     ← on only $1,186,900 of sales
  MINUS COGS AT 27.8%      $329,958
  ─────────────────────────────────
  LEFT FOR LABOR           $359,117     ← NOW convert: ÷ $1,186,900 = 30.3%

Then the punchline, which is what they should remember: \$9,208 a week available, \$10,970 a week scheduled, 110 hourly hours short. Anchor it in hours. Hours are physical; percentages are not.

The second-hardest point is the denominator problem in §19.1. Students will quote a labor percentage without stating what they divided by, forever, unless you make them do it wrong once. Give them \$10,970 and three denominators and let them produce 40.4%, 36.8%, and 36.0%, then ask which one is correct. (All three. None of them. That is the lesson.)

A demonstration that works

The blank grid, live, in fifteen minutes.

Put a seven-column schedule grid on the board with no numbers. Give the room Bellwether's forecast: Tue 62, Wed 78, Thu 92, Fri 120, Sat 123, plus two brunches at 110. Tell them the labor target is 32% and nothing else — no staffing guide, no bands, no rates.

Let them staff it by feel for ten minutes, in pairs. Collect three answers and write the total hours on the board. In a class of twenty-four you will typically get a spread of 350 to 600 hours for the same restaurant on the same week — a range worth roughly \$190,000 a year.

Then hand out the staffing guide and have them redo Friday alone. The spread collapses to almost nothing.

That is the entire argument for a staffing guide, delivered in fifteen minutes by the students themselves, and it is far more persuasive than the section that argues for it.

A second, shorter demonstration: read Figure 19.7's wage lines aloud without the "WHAT IT DOESN'T" block and ask the room to grade the night. They will grade it favorably — the restaurant came out \$12 ahead. Then read the second block. The silence is the lesson.

Timing

Assessment suggestions

• Exercise 19.24 or 19.27 as a graded individual build. 19.27 (the 344-hour schedule) is the more revealing assignment because it forces students to name what they are destroying.
• Exercise 19.42 as a short written argument — pick one structural lever and defend it. Grade on whether the arithmetic foots and whether the cost of the choice is stated honestly.
• Quiz questions 19, 22, 24, and 26 as a ten-minute in-class check.

What to watch for in student work

• Schedules where somebody is at 42 hours and nobody noticed. Always ask for the hours column.
• Staffing guides written in people rather than hours (a "server" is not a unit of anything).
• Labor percentages quoted without a denominator.
• Students who close the gap by cutting the owners' salaries and do not say so out loud. That is a legitimate answer and an illegitimate silence.
• Students who "solve" the 30.2% problem. Nobody solves it. If a solution foots, the arithmetic is wrong somewhere — usually the salaried block or the payroll-tax gross-up.