definiens: means one or more related defects in the design, material, or workmanship of the Detectors for which [COMPANY] is solely responsible, and which ( a ) are substantially similar in nature or origin, ( b ) materially affect the Detector 's safety or efficacy, and ( c ) are found in fifteen ( 15 ) percent of the installed base of Detectors within any twelve ( 12 ) months period during the term of this Agreement, except that ordinary wear and tear shall not, under any circumstances, be deemed to give rise to an Widespread Failure situation . In the event of an Widespread Failure, ( a ) [COMPANY] covenants that Detectors not yet delivered to [COMPANY] will be upgraded, prior to delivery, to correct such Widespread Failure, and ( b ) with respect to Detectors for which the warranty under subsection F of Section 1.3 has expired, [COMPANY] will, at its own expense, provide to [COMPANY] such replacement components for such Detectors or spare parts as may be required to eliminate the defect giving rise to such Widespread Failure . [COMPANY] will perform any work relating to the installation or other use of such replacement components at its own expense . With respect to this Section 1.4, [COMPANY] shall assume responsibility for any defects or problems that otherwise fall within the definition of that are due to defects, flaws or omissions in any component of the Detectors supplied to [COMPANY] by any of [COMPANY] 's vendors or suppliers