Guild Management Expected Drop Value Estimator

1. Define the guild reward event
Choose one comparable reward opportunity, such as opening a contribution chest or resolving a guild milestone.

2. Price each listed reward
Assign every tier a common internal economy value so the weighted contributions can be added meaningfully.

3. Enter guild-specific drop chances
Use the probability for each reward tier from the same loot table or reward rule.

4. Inspect tier contributions
Compare how much each tier contributes to the average even when its raw drop chance is small.

5. Check whether outcomes overlap
If one chest can award multiple listed items, a probability total above 100% can be valid; otherwise keep mutually exclusive chances within 100%.

Each probability p is entered as a percentage and converted to a decimal before multiplication. Each v is the value assigned to that outcome in a consistent unit. When the outcomes are mutually exclusive, their probabilities should normally total no more than 100%; any remainder can represent no drop. If outcomes can occur independently, the sum may exceed 100%, but the interpretation changes to expected combined value rather than one mutually exclusive result.

What the result means

A higher expected value means the reward table releases more average value per opportunity under the entered probabilities and item values.

Treat the result as an economy-planning average. Actual player outcomes remain variable, especially when high-value rewards are rare.

Given
Common guild reward: 50% at 1.5 value units
Enhanced reward: 30% at 6 value units
Rare guild reward: 8% at 22 value units

Calculation
(0.50 × 1.5) + (0.30 × 6) + (0.08 × 22)
= 0.75 + 1.80 + 1.76
= 4.31 value units

Result
The expected value is 4.31 units per guild reward opportunity. The rare tier contributes 1.76 units to the average despite appearing in only 8% of opportunities.