lifecycle - срок службы товара

over the lifecycle normalized rate for overhead costs

не могу понять предложение, помогите пожалуйста,

normalized rate

Thank you in advance

"Overhead rate
The rate (often expressed per hour) applied to the time taken to produce a product/service, used to allocate production overheads to particular products/services based on the time taken."

"Normalized overhead rate
A normalized overhead rate is a rate based on the average activity of many periods " past and present " rather than based only on the expected activity of the current period."

Т.е. считают затраты на протяжении всего цЫкла, а потом вычисляют среднее значение.