text: The condition of a long-lived asset is affected by its durability , the quality of its design and construction , its use , the adequacy of maintenance that has been performed , and many other factors , accidents ( an unforeseen and unplanned or unexpected event or circumstance ) , catastrophes ( a tragic event ) , disasters ( a sudden calamitous event bringing great damage , loss , or destruction ) , and obsolescence .
  
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  Quality of design has the largest impact on the asset 's condition out of all the other factors .