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Worksheet Introduction

The System Inventory Worksheet will help you:

  • Identify all of your system’s assets
  • Record the condition of your assets
  • Record the service history of your assets
  • Determine your assets’ adjusted useful lives
  • Record your assets’ ages
  • Estimate the remaining useful life of each of your assets.

Usually, there are two steps to estimating useful life:

  1. Determine the expected useful life by using the manufacturer’s recommendations or the estimates provided in the worksheet. Adjust these numbers based on the specific conditions and experiences of your system
  2. Calculate an adjusted useful life by taking into account the service history and current condition of your asset.

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Step 1 – How Do I Inventory My Assets?   Instructions for the Worksheet