This　paper　proposes　an　integrated　framework　for　maintenance,　spare　parts　ordering,　and　quality　control　planning　within　a　multi-state　production　system　that　is　subject　to　two　competing　modes　of　failure:　hard　failure　and　soft　failure.　Hard　failures　occur　suddenly　and　without　any　prior　warning,　whereas　soft　failures　develop　following　the　onset　of　a　defect.　The　quality　of　the　product　is　significantly　influenced　by　the　state　of　the　system,　as　a　defective　system　typically　leads　to　an　increase　in　non-conforming　products.　To　address　this,　periodic　inspections　are　conducted　to　detect　defects　early,　and　preventive　replacements　(PR)　are　scheduled　upon　identification　of　a　defective　state,　which　acts　as　a　crucial　quality　control　indicator.　Corrective　replacements　(CR)　become　necessary　when　either　a　hard　or　soft　failure　occurs.　The　timeliness　of　these　replacements　is　contingent　upon　spare　part　availability;　thus,　we　implement　a　hybrid　spare　ordering　policy　to　enhance　responsiveness.　PR　and　CR　are　executed　promptly　when　time-based　ordered　spares　are　accessible,　while　a　condition-based　order　is　triggered　in　the　event　of　shortages　in　time-based　orders.　To　determine　the　optimal　inspection　interval　and　time-based　spare　ordering　point,　we　analyze　the　renewal　scenarios　of　the　system　with　the　objective　of　minimizing　the　expected　cost　rate.　We　propose　an　optimization　algorithm　and　a　simulation　procedure　to　validate　the　effectiveness　of　our　policy　through　numerical　experiments.　The　results　highlight　the　significant　potential　of　our　approach　in　reducing　unit　losses　related　to　non-conforming　products　while　effectively　minimizing　the　expected　cost　rate.