LOCK IN · Guide for program staff

A freight-loading practice simulator in a web browser. What a participant does, how they join a crew, and what an instructor sees.

How LOCK IN fits togetherTwo kinds of people use it. Neither installs anything.

A participant

Opens trailer-load.com in a web browser on any computer or Chromebook, and loads freight. No account, no email, no download. To be seen by an instructor, they join the instructor's crew with its code, a name and a 4-digit PIN.

An instructor

Signs in to trailer-load.com/dashboard, the only account in LOCK IN. Makes a crew, gives out its code, and sees each person's practice on a roster that says what to coach next.

Part 1 · A participantFrom the first screen to the report at the end of a shift.

1Open the front page

Go to trailer-load.com. After a short logo, the menu is the front page. New participants start with TRAINING; it is tagged "NEW HERE? START HERE".

The LOCK IN menu: TRAILER-LOAD, DAILY, TRAINING, PRACTICE and LEADERBOARD, with JOIN A CREW at top right.

2TRAINING: watch the trainer

A trainer builds a full wall, one placement at a time, and gives the rule and the reason for each move. NEXT shows one placement; AUTO plays them in turn and becomes PAUSE while it runs. There is no clock and nothing to fail. At the end the participant signs the training record.

Training: the trainer's rule and reason, with NEXT and AUTO.

3PRACTICE: load the trainer's wall yourself

The same freight, in the same order, every time. The participant places every piece under the same loading rules, with no clock, no score, no water and no write-ups. The coach gives the trainer's reason for the piece in hand and counts how many pieces went where the trainer put them. Any spot that fits and follows the rules is allowed.

A hazmat arrives late, after the belt freight. The trainer's call is to leave it on the rack for the next trailer, because there is no legal low slot left.

Practice: the coach at right and SHOW ME outlining the trainer's spot on the wall.

4TRAILER-LOAD: a wall at full tempo

The first time, a pre-sort meeting lists ten one-line rules and the clock rule. Then the wall: freight comes up the belt, oversized pieces wait in special handling, and every placement is checked against the rules as it lands. Messages name the rule and the fix. A repeated warning becomes an incident on the record.

The first wall: special handling at left, the trailer in the middle, messages and controls at right.

5Pause

P or the pause button opens the pause clipboard: resume, settings, restart, clock out and see the stats, the crew, and the main menu.

6The post-sort report

Clocking out ends the shift and shows its numbers. From there, the post-sort report covers the last wall and the whole session, with the incidents on record. It is a practice record, not a grade on the person.

7Settings

Text size, colorblind modes, reduced motion, sound, and one-key shortcuts that can be turned off. Every menu and mode works from a keyboard.

Part 2 · How a participant joins a crewThere is no account and no email.

8JOIN A CREW, then the code

On the menu, top right, choose JOIN A CREW and type the code the instructor gave out.

The crew panel asking for the crew code.

9A name and a PIN

On a name + PIN crew, type the name the instructor knows you by and choose a 4-digit PIN. On any other computer, the same name and PIN join you as the same person. Five wrong PINs lock the name for 15 minutes; the instructor can reset it.

10Joined

The button on the menu now shows the participant's name. From here, their TRAILER-LOAD and DAILY walls and their sessions reach the instructor's roster. On a shared computer, LOCK IN asks who is playing before each TRAILER-LOAD or DAILY: SOMEONE ELSE takes that computer off the crew, so the next person joins with their own name and PIN.

The menu with the corner button showing the participant's name.

11A manual crew: the personal code

On a manual crew, the instructor adds each name and hands out a personal code instead. The participant types the code once and is joined under that name.

The personal-code step of a manual crew.

Part 3 · The instructortrailer-load.com/dashboard. The instructor is the only account in LOCK IN.

12Create an account, confirm it, sign in

An email address and a password of 12 or more characters. LOCK IN sends a confirmation link; after that, sign in. Forgot the password? The sign-in page sends a reset link.

13Make a crew

A crew is a class or a cohort. Give it a name and a join code, and choose how people join: name + PIN (people add themselves) or manual (you add names and hand out personal codes).

14The join card

Each crew has a join card with the steps and the code, to read out or print.

15The roster and what to coach

Everyone on the crew on one report, least engaged first: summary cards at the top (on the crew, not started, average integrity, walls loaded), three sheets (LIFETIME, MOST RECENT SESSION, MOST RECENT WALL), and column groups to switch on and off. Click any column to sort by it, and click a name for that person's full record. WHAT TO COACH names the rule each person broke most often, by its name in LOCK IN's rule list, with what to practice. The table on the last page explains every column.

The cohort report: cards, sheets, column groups and WHAT TO COACH.

16See it filled in: the demo dashboard

trailer-load.com/dashboard/?demo opens the dashboard with a demo crew, no sign-in needed. Its people are simulated players: a script played LOCK IN for each of them and LOCK IN recorded their walls the way it records anyone's. It is labeled as staged and nothing in it can be changed.

The demo crew's roster with WHAT TO COACH filled in.

Part 4 · What the roster says, and what to do about itOne line on what each column is, one on what an instructor can do with it.

Column	What it is	What to do with it
Sessions, Walls	How many times the person played, and how many walls they finished, on this crew.	The roster lists the least practiced first. Zero walls means they have not started: TRAINING, then PRACTICE.
Joined, Last played	When they joined the crew and when they last played.	A long gap is a person to check in with.
Best score	Their highest wall score. The score rewards a dense, stable, safe wall loaded at a steady pace.	A rising best score is progress. It is not a measure of job readiness.
Avg integrity	How sound their walls are, on average, from 0 to 100. Unsupported heavy freight, narrow towers, overhangs, holes and lean all lower it.	Under 70: have them run PRACTICE with SHOW ME and watch the support rules in TRAINING again.
Best pieces/hr	Their fastest pace on one wall, in pieces per hour. Every piece counts here, smalls included, so it can read higher than the in-game rate, which counts freight only.	Pace comes last. A fast wall with low integrity or incidents is the one to slow down.
Incidents	Safety mistakes on the record, such as hazmat loaded above the waist or hazard classes loaded too close.	Read WHAT TO COACH for which rule, and go over that rule with them.
Collapses	How many times three or more pieces came down at once.	Taper stacks, each layer narrower than the one below, and lock a shelf before building higher.
The three sheets	LIFETIME is everything on this crew. MOST RECENT SESSION and MOST RECENT WALL show each person's latest.	Use the recent sheets for this week, LIFETIME for the trend.
Throughput: Pieces, Avg and Peak pieces/hr, Total score	How much they have loaded and how fast.	Read pace next to integrity and incidents, never alone.
Quality: Wall %, Density, Cube eff, Special handling use, Smalls use	How full and how tight their walls are, and how much of the special handling and smalls that arrived they loaded.	Sound walls with low density: they are safe but leaving space. Have them tile each course tighter.
Craft: Shelves, Bulkheads, Nests, Recoveries, Bonuses, Hazmat shelves, Bags placed	The loading moves LOCK IN rewards: full rows locked, double locks, tire nests, saves after a crunch.	Few shelves locked: have them close a full row before building up.
Faults: Hazmat high, Hazmat crushed, Segregation, Killer pairs, Crunches, Rejects	Each kind of incident on its own, boxes crushed, and drops LOCK IN refused.	The biggest number is the rule to go over first.
Habits: Water, Special handling dwell, Aisle warnings, Rotations, Lifts, Placed from staging	How they work: water breaks taken, special handling left sitting, the aisle kept clear, how often they turn a piece or pick one back up.	Many lifts and turns on few pieces can mean guessing. PRACTICE with SHOW ME helps.
Column groups	ENGAGEMENT, QUALITY, FAULTS and COACH show first. THROUGHPUT, CRAFT and HABITS switch on above the table.	Click a column to sort by it. Click a name for that person's full record.
What to coach	The incident type the person had most often across their sessions, named as LOCK IN's rule list names it, with what to practice. With no incident on record it points to repeated collapses, low integrity, or not started.	Start the next session there.

Good to know

Practice, not certification. LOCK IN does not certify anyone and does not replace forklift, OSHA or hazmat training. It is practice before and alongside them. Its scores are not for deciding who is job-ready.
Not yet studied. No study has measured LOCK IN's effect on learning yet. A pilot is how that starts.
What is collected. Participants make no account and give no email. A crew member's walls and sessions go to their instructor under the name the instructor knows. Nothing about a disability is collected. Removing a person from a crew deletes their results. Anyone who signs a public board sends three initials and that wall's numbers, and the site keeps anonymous daily play counts.
Access. It runs in a web browser on a computer or Chromebook. It is visual, so it does not work for someone who is blind. Keyboard play, colorblind modes, text size and reduced motion are in Settings.

For instructors who want it: how LOCK IN teaches, and how to coach from the roster. The loading rules themselves, with pictures, are on Day One.