损耗与事故

Attrition is the loss of equipment — not manpower — during the course of a war when fighting on the offensive. While only land units suffer from attrition, air units may suffer accidents, especially when moving in harsh weather, resulting in loss of equipment.

Causes

• Training: 6% attrition.
• Terrain: Up to 50% attrition.
• Weather: Up to 70% attrition and +60% rate of air accidents.
• Resistance: Up to 25% attrition.
• Out of supply: Up to 30% attrition.

组织度的

不论是否处于战斗中，损耗都会导致一支部队每小时损失 0.1 * 损耗 的组织度。

When out of supply, the division also suffers from an extra organization loss of 0.3 per hour scaled by out of supply progress, reaching full in 30 days.

装备的损失

更高的可靠性会降低损耗导致的装备损失。

陆军单位

对于陆军, 每一种装备平均每小时遭受的损失(equipment loss per hour)是

[math]\displaystyle{ \text{equipment lost per hour} = 0.5 \cdot \text{attrition} \cdot P(\text{loss}) \cdot \max\{1, \text{number of equipment} \cdot P(\text{per type loss}) \cdot (1 - \text{reliability} )\} }[/math]

其中 P(loss) 和 P(per type loss) 分别为 ATTRITION_EQUIPMENT_LOSS_CHANCE (基础数值为0.1) 和 ATTRITION_EQUIPMENT_PER_TYPE_LOSS_CHANCE (基础数值0.1) 。参考来源： defines.

具体而言：

当可靠性小于1-10/装备总数时，损失由损耗、可靠性、装备总数共同决定： [math]\displaystyle{ \text{reliability} \lt 100\% - \frac{10}{\text{number of equipment}}, \frac{\text{equipment lost per day}}{\text{number of equipment}} = 12\% \cdot \text{attrition} \cdot (100\% - \text{reliability}) }[/math];

否则，仍会存在一个基本损失，仅由损耗决定： [math]\displaystyle{ \text{equipment lost per day} = 1.2 \cdot \text{attrition} }[/math].

例如，若损耗为100%、可靠性为0%, 则每天都会有12%的装备损失掉。

又例如，当可靠性为80%，（假设装备总数大于50且库存充足），100天的持续训练（这足够将1级训练为2或3级）将会损失14.4%的装备。

请注意，同一种装备的不同类型的损失是分开独立计算的，所以总损失会受到装备类型数的影响。这种情况会发生在你的部队使用了缴获的装备或者是不同变种的装备之时。

并且，基本损失相对于数量较小的装备而言，也会很大。比如说炮火支援连（12门）和重自行防空炮营（8辆）。例如，若损耗为100%，则炮火支援连每天都会损失10%，重自行防空炮营则为15%。

为了最小化装备损耗

To minimize equipment loss from attrition, it is enough to keep reliability of variant equipment types above [math]\displaystyle{ 1 - \frac{10}{\text{number of equipment}} }[/math] . This means 0% for 10 or under, 16.7% for 12 pieces, 58% for 24 pieces, 80% for 50 pieces, 95% for 200 pieces and so on. Therefore increasing reliability through variant equipment and using maintenance companies matters the most in large divisions using expensive equipments, like tanks. Also note that normal artillery has 50% reliability while rocket artillery has 80% reliability.

Air units

While aircraft do not suffer from attrition, they have a chance of accidents when taking off/landing. This is

[math]\displaystyle{ \text{accident chance} = 0.1\% \cdot \left( 100\% - \text{reliability} \right) }[/math]

or equal to 1% attrition for land units. Carrier-based aircraft suffer twice the accident rate. It can quickly turn into a major issue, chewing down through the pool of accessible planes regardless of how well the air combat goes.

Naval units

Ships do not suffer from attrition, but the reliability corresponds with probability of getting critically hit by enemy attack.

Methods to reduce equipment loss

There are several ways to reduce the effects of equipment loss. One way is to improve reliability by attaching a Maintenance Company to a division or creating new variants of equipment, such as tanks, ships, or planes, with increased reliability. Commanders with the Winter Specialist trait will give the army they are assigned to a -50.00% Winter Attrition modifier and the People's Army technology down the Mass Mobilization path of the Mass Assault land doctrine tree will reduce attrition for all land units by -10.0%.

Custom difficulty settings

Adjusting the strength slider of a major country prior to a game will reduce the amount of attrition that that country's units will receive. However, doing so disables achievements.

Footnotes

机制 

事件与决议

事件 • 决议