Lean for Beginners: Cannabis · Lesson 10 of 10 · Week of December 14

Holding the gains

Making an improvement is the easy part. Keeping it is harder, because every improvement starts to wear down the day after it's made. This last lesson is about what keeps gains in place: checking that the standard is still followed and still fits, a short daily meeting at the work, and a scorecard the team owns. It's also about the ways those tools go wrong.

By the end of this lesson you can:

explain why gains erode, and why working harder makes it worse;
run a short daily huddle at a board, and say what a huddle is for and what it isn't;
build a safety, quality, delivery and cost scorecard where every red has an owner;
tell a leading measure from a lagging one, and spot a measure being gamed;
say what a board must never replace or show in a licensed cannabis operation.

You need Lessons 1 to 9 first. After this lesson comes the final test.

Why gains slip

An improvement erodes. Tools wear, procedures go stale, people leave and new people are taught from memory. Unless somebody puts time into rebuilding the improvement, it fades back toward how things were.

There is a trap in this. Researchers Nelson Repenning and John Sterman studied a dozen or more cases and described what they called the capability trap. When output is under pressure, people cut the time they spend on improvement and maintenance in order to work harder. That makes the process worse, which makes output fall further, which brings more pressure. Working harder feeds the problem it was meant to fix.

Two cautions. First, you'll see claims such as "70% of Lean efforts fail." I couldn't trace any of them to a source, so don't repeat them. Second, the research on why gains last is thin. Reviews find many interacting factors, with different weights in different places, and healthcare reviews point to engagement, leader commitment and workload. Most studies follow results for only one or two years.

The practical point is simple: keeping a gain takes planned time, a person who owns it, and a regular look at how it's doing. The rest of this lesson is that look.

Checking the standard, and the leader's part

An audit of standard work is a short, regular check, at the work, that the standard is being followed and that it still fits. When there's a gap, the question is "why?", and the answer is a change to the standard or to the support around it. It isn't blame. The Lean Enterprise Institute describes standardized work as something to improve continuously, so a check that finds a better way is a success.

Leaders have a standard too. Leader standard work is a leader's own routine: walking the floor, answering the signals people send, checking that standards are followed, and coaching. Lean author Jeffrey Liker warns that boards without coaching leaders turn into empty rituals. People go through the motions, and nothing changes.

When a skilled operator skips a written step and gets better results, ask why, test it, and if it really is better, revise the standard. In a licensed operation the revision goes through your procedure control, because you must follow your written procedures (935 CMR 500.105(1)). The standard changes through the process, not around it.

The daily huddle

A daily huddle is a standing meeting at the board, near the work, at the same time every day. The team looks at yesterday against target, today's plan and the problems on the board. Each problem is logged with an owner and a date, and anything that can't be settled at the board goes up to the next level of management.

Keep it short. Healthcare guidance from the Institute for Healthcare Improvement says 10 minutes or less, and the US Agency for Healthcare Research and Quality says 10 to 15. A common agenda: yesterday's concerns and successes, today's risks, issues already being tracked, any other input, and announcements.

A huddle finds problems. It doesn't solve them. Solving happens later, with the tools from Lesson 9, by the people who have to fix it.

In Massachusetts, no cannabis rule requires a huddle or says how to run one. And a huddle doesn't satisfy any rule. If you want huddle time to count toward required training, ask your compliance lead what records they need (935 CMR 500.105(2) and (9)).

The scorecard: safety, quality, delivery, cost

A common board uses four headings, SQDC: safety, quality, delivery and cost. Each row has a target, the actual, and a color: green if the target was met, red if not. Every red gets an action, an owner and a date. A board with no owner or date turns into wallpaper.

Few. Four or five measures. More than that and nobody can hold them in their head.
Owned by the team. The people who do the work should record and read their own numbers. If managers own the number, the team tends to protect it, and not use it.
Leading and lagging. A lagging measure counts what already happened, such as injuries. A leading one shows whether prevention is working, such as the share of start-of-shift safety checks done. You want both, and you want to be careful to log near-misses and never color them red, so reporting isn't punished.

Example measures by area

These are ideas to look for, not a design.

Area	Quality and flow	Time and stock
Cultivation	Room readings in range (leading); first-submission lab pass rate	Hours from harvest to the dry room
Post-harvest	Weigh-in and weigh-out variance	Lead time from harvest to release, counting the waiting around the test hold and not the hold itself; lots nearing test expiry
Manufacturing	First-pass in-process QC; batch yield against expected; single-serving potency within the allowed range	Changeover minutes
Packaging and fulfillment	First-pass label, seal and weight checks; pack-out count variance	Orders shipped complete and on time; rework minutes
Retail	End-of-day count variance	Pre-orders ready by the promised time; top-seller stock-outs at open; peak queue time

When a measure becomes a target

Once a measure becomes a target, people shift toward the number, and it stops reflecting the work. The idea is called Goodhart's law, after an economist who wrote about it in the 1970s. The popular wording is usually credited to the anthropologist Marilyn Strathern.

There are well-documented examples of gaming. A well-known study of the English public health care system found organizations changing their behavior to hit national targets. Jerry Muller, in his 2018 book on metrics, argues that numbers should complement judgment, not replace it.

An example, with made-up details. A bonus is tied to "100% of orders on time." Within a month the number reads 100%. Before you celebrate, check whether promise dates were padded, or short orders counted as complete. The measure moved. The work may not have.

Most of the gaming evidence is from the public sector, so I'm reasoning when I apply it to a cannabis floor. But the lesson is the same. Punishing a red teaches people to hide reds. Use the board to ask "what's different about Thursday?", and not "who did this?"

Reading a chart of the measure

A run chart plots a measure over time, in order, around its median. It's a good way to ask "are we holding the gains?" Three habits:

Don't react to one point. A single point is weak evidence, especially if it's close to the line.
Know the signals. A shift is six or more points in a row on one side of the median. A trend is five or more in a row rising or falling. These rules need more than about 10 points to be meaningful.
Remember the rules are contested. One simulation study found the popular run-chart rules signal too often. Treat a signal as a reason to look, not as proof.

A control chart adds limits, usually three sigma either side of the center line. A point outside the limits, or a pattern that isn't random inside them, calls for investigation. For a team board, a run chart is usually enough.

What a board must never replace, or show

A board is working data. It isn't a regulatory record. These are the rules it must stay out of the way of:

Inventory. Real-time inventory, the monthly and annual counts, and the tracking-system entries are required records (935 CMR 500.105(8)). A variance tally on a board is not one of them.
Required records. Procedures, inventory, personnel and training, and waste records have to be available for inspection (500.105(9)). A scorecard is not a required record. The waste record, with its date, type, quantity, method, location and signature, is kept for three years (500.105(12)), and a scrap tally doesn't replace it.
Reporting. A red cell starts no clock and stops none. Inventory discrepancies have to be reported to the Commission and law enforcement immediately, within 24 hours of discovery (500.110(9)). Ask your compliance lead what your procedures count as a reportable discrepancy.
Testing. A target for "test pass rate" must never push retesting outside what the rules allow (500.160).
Inspections. The Commission can inspect any area, activity or record without notice (500.301). What's on a board has to be accurate and match the records.

What not to post. Don't put on a board: access codes or keys; camera, alarm or vault details; cash-handling timing or amounts; exact quantities on hand; incident details or names tied to suspicion; customer or patient information; or anything about an individual's discipline. Keep boards inside limited-access areas, away from windows and visitor routes. Healthcare huddle guidance also says to follow privacy rules on boards.

The arithmetic: reading one week of a board

Every number below is made up to show the steps. Yours will differ, and none of these is a benchmark.

An example, with made-up numbers. A jar-packing cell has these targets. Safety: the start-of-shift check is done and nobody is hurt. Quality: first-pass quality of at least 98.0%. Delivery: orders shipped complete and on time, at least 95%. Cost: rework of at most 30 minutes a day.

Quality, by day: Monday 392 of 400 is 98.0%, green. Tuesday 372 of 380 is 97.9%, red. Wednesday 415 of 420 is 98.8%, green. Thursday 389 of 410 is 94.9%, red. Friday 384 of 390 is 98.5%, green. The week: 1,952 of 2,000 is 97.6%, red.
Delivery: 24 of 24, 21 of 22 (95.5%, green), 25 of 25, 20 of 23 (87.0%, red) and 26 of 26. The week is 116 of 120, which is 96.7%, green.
Cost: rework of 20, 22, 12, 95 and 15 minutes. Thursday's 95 is red. The week is 164 minutes against 150 allowed, red.
Safety: green on four days. On Thursday the start-of-shift check was skipped, so it's red, even though nobody was hurt. A safety row that only counted injuries would have stayed green.

What the reds tell you, which is where to look and not why:

Four of the five daily reds are on Thursday, and Thursday has 21 of the 48 failed jars (43.8%). Without Thursday the week is 1,563 of 1,590, or 98.3%, which is green. Thursday is the story.
Weekly and daily colors can disagree. Quality is red for the week with three of five days green, and delivery is green for the week with a red day. Read both.
Rework per failed jar was 95 ÷ 21 = 4.5 minutes on Thursday and 2.4 to 2.75 on the other days. Thursday's failures may differ in kind. That's a question for the gemba.
Tuesday's red is one jar from green (373 of 380 would be 98.2%). Log it and look, but one point near the line is weak evidence.
Five points can't support run-chart rules. Keep the measures going for three weeks before you claim a shift.

A number not to report: "75% green," 15 of the 20 daily cells. It rewards loosening targets.

A line for the red log might read: "Thursday delivery red, 3 of 23 orders late or short. Pull Thursday's order and reject sheets and list what differed. Owner: cell lead. For the Monday huddle."

Knowledge check

Five questions, graded for you. Sign in to take the check, save your progress and count this lesson toward your certificate. Sign-in opens on Monday, October 12.

Your task: list what's tracked

This is a walk, not a project. Fix nothing, and take no photos.

List every number someone already tracks in your area. For each, write who records it, how often, who sees it, and one decision it ever changed.
Pick one number. Write how it could look better without the work being better.
Ask one person about a time a good worker skipped a written step. Record the answer in one line.
Note anything on a board that you wouldn't want a visitor to see.

Leave out anything proprietary.

Open the printable tracking sheet

Then your area's scorecard and huddle board

Each area has a scorecard of ten measures, defined so two people count them the same way, and a one-page weekly huddle board to match. They are part of this lesson, and they're listed under it in the lesson bar. Open yours, and put three measures on the board first.

01Mothers and clones to harvestCultivationOpen the scorecard → 02Harvest, dry, cure, trim, vaultPost-harvestOpen the scorecard → 03Extraction, infused products, pre-rollsManufacturingOpen the scorecard → 04Packaging, labeling, wholesale ordersPackaging and fulfillmentOpen the scorecard → 05The store, the menu, the counterRetailOpen the scorecard →

Your floor, your data. What you write on a worksheet stays with you. It is paper, and nothing you write on it reaches this site. If you talk about your floor in public, keep it general: leave out license numbers, batch or package IDs, supplier and customer names, and any number your employer treats as confidential.

Sources

Where the facts in this lesson come from. Facts last checked October 1, 2026. If you find one that is out of date or wrong, tell me.

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