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No Trouble Found (NTF) is a term used in various fields, especially in the electronics industry referring to a system or component that has been returned to the manufacturer or distributor for warranty replacement or service repair, but operates properly when tested. This situation is also referred to as ''No Defect Found'' (NDF) and ''No Fault Found'' (NFF). ==Causes== NTF returns are often caused by the following patterns: *Service technicians using a "shotgun" approach to troubleshooting when they are unable to quickly diagnose a problem or error. Under time pressure to resolve problems quickly, the technician uses multiple replacement parts in hopes that one of them will fix the issue. *Inability to distinguish hardware problems from software or configuration issues. For example, a device driver problem may mimic a true hardware problem. *Intermittent problems. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「No Trouble Found」の詳細全文を読む スポンサード リンク
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