Characteristics　like　mission　cycle,　failure　number,　and　failure　mode　act　as　crucial　metrics　for　evaluating　the　reliabilities　of　products　subject　to　various　failure　modes.　As　a　result,　this　study　develops　two　distinct　strategies　to　manage　product　reliabilities.　The　first　strategy　focuses　on　managing　warranty-stage　reliability　and　employs　renewable-free　replacements　to　enhance　warranty　appeal.　Using　either　the　criterion　of　＂whichever　occurs　first＂　or　＂whichever　occurs　last＂,　this　strategy　is　called　a　three-dimensional　random　warranty-first-or-last　approach　with　renewable-free　replacement.　The　second　strategy　involves　various　replacements,　providing　comprehensive　management　of　post-warranty　reliability.　The　first　approach　within　this　second　type　of　strategy　is　called　the　bivariate　random　periodic　replacement-first-with-corrective-replacement　method.　The　proposed　warranty　can　identify　reliability　heterogeneities,　which　serves　as　the　basis　for　adapting　the　second　approach　within　the　second　type　of　strategy.　Time　and　cost　factors　are　used　to　quantify　the　proposed　strategies.　Numerical　analyses　are　carried　out　focusing　on　key　parameters.