Guide
Before you click “draw,” decide one thing: can the same person win twice?
One prize each? Draw without replacement. Independent draws? Replacement may be fine. Fixing that rule before the result avoids a surprising amount of confusion.
Three prizes: can one person win all three?
If the answer is no, use a draw without replacement: remove each winner before the next draw. If the answer is yes, each draw can start from the same full candidate list.
The important part is deciding before the result appears. A one-line rule written in advance makes the process much easier to explain.
Weight 2 does not mean “guaranteed to win twice as often” in one draw
Weighted selection changes relative probability. A weight of 2 versus 1 means twice the selection weight, not a guaranteed 2:1 pattern in a small number of outcomes.
Keep the reason for the weights as well as the numbers. That matters more than the tool itself when someone asks why the odds differed.
If everyone needs an order, shuffle once
For presentation order or seating, a shuffle is cleaner than repeatedly drawing one person and manually removing them. For groups, use a team split.
Choosing the operation that matches the real task reduces duplicate-handling mistakes and leaves a simpler record of what happened.
For a public draw, save the inputs and rules too
Keep the candidate list, duplicate policy, invalid-entry handling, and any weight rules. The result alone does not show what population was actually drawn from.
Regulated contests, hiring, or audited allocations may require legal or procedural controls beyond randomization software. The tool handles selection; governance remains a separate layer.