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Tutorial · Grade 117. First Shift

Park incoming cars and authorize completed stays through the exit gate.

Scenario

Arriving cars join the entrance queue, while departing cars request exit authorization.

Problem statement

Welcome to ParkFlow Smart Facility Operations!

Your parking facility is opening its first shift. Arriving cars queue up at the entrance, while parked cars finish their stay and request to exit.

Controlling a facility requires managing both ends: release departing cars when an exit is requested so capacity is freed, and park arriving cars in available standard spaces.

The starting brain has no rules. Add two rules: 1. WHEN hasExitRequest -> DO release-vehicle 2. WHEN hasWaitingVehicle -> DO park-standard

Order exit release above arrival parking so departing cars free up spots for incoming vehicles.

What this teaches

Coordinate both entrances and exits: process exit requests first to free capacity for new arrivals.

Scroll down to build and test your solution.

Active controller

Apply & Run executes only the selected controller.

How a rule works

A rule has two parts:

WHEN <something is true> → DO <this action>

  • WHEN is a question about what is happening right now. For example: "Is it raining?" or "Is there a wall ahead?"
  • DO is what happens when the answer is yes.
  • The simulation runs one step at a time.
  • On each step, the rules are checked from top to bottom.
  • The first rule that is true wins. The rules below it are skipped for that step.
  • To change which rule wins, move it up or down the list.
  • If no rule is true, nothing happens on that step.
  • Some actions have more than one step, like "turn right, then move". You build these in the Functions tab.
  • Once a multi-step action starts, it finishes all its steps before the rules are checked again. It only stops early if the next step is not safe.
See an example

Two rules for deciding about an umbrella:

1  WHEN isRaining  → take an umbrella
2  WHEN always     → leave the umbrella at home
  • It is raining. Rule 1 is true, so you take an umbrella. Rule 2 is skipped.
  • It is sunny. Rule 1 is false, so rule 2 is checked next. Rule 2 is always true, so you leave the umbrella at home.
  • Order matters. If rule 2 were on top, it would be true every day, and you would never take an umbrella.

Rule folders

Categorise cards without changing their global execution order.

No rules yet. Nothing will happen until you add at least one rule.