Automated fiber placement (AFP) manufacturing techniques significantly increase production rates due to fewer interruptions and improved consistency, while reducing part count, lead-time and production cost with increased material yield compared to hand layup (HLU). However, the AFP process often results in scrap material due to leftover materials in the creel and faces challenges when laying up highly contoured small complex parts. When fibers are steered around complex counters, they tend to produce numerous defects and undesirable features such as puckers (wrinkles in inner radius of the tow) and overlaps. To overcome these challenges, a hybrid of additive and fiber placement technologies called fiber patch placement (FPP) is introduced for producing geometrically complex fiber composites and curvilinear reinforcements. This multi-robotic process enables a new degree of freedom in automated fiber deposition for complex shapes at a significantly higher rate than AFP and HLU. Upon completion of structural analysis and optimization, the design is transferred to a software package for optimizing reinforcement patch placement with the load path to meet design requirements and generating tool path and numerical computer (NC) codes for robot motions. Offline programming and simulation software provide an opportunity to access the manufacturing operation virtually, prior to executing the AFP process. With the use of high-performance robotics and advances in technology, FPP aims to aid in bridging the manufacturing requirements for production of geometrically complex fiber composite parts. This study discusses manufacturing and modeling methodologies to effectively engineer FPP parts with general practices for patch modeling, integrating FPP properties into finite element models and design analysis. Furthermore, this work aims to detail the manufacturing and testing performance of FPP composites though static and fatigue coupon level materials testing. Strength knockdowns due to fiber discontinuities were evaluated using flat panels with various patch overlap lengths for design optimization method development. Expanding on foundations and findings from the test and finite element modelling of FPP coupons [1], the validation effort was extended on to a part level cylindrical variable radius compression test article. In both cases, the test results closely matched with the analysis models, affirming the reliability of modeling tools in aiding complex FPP design. © 2025 Soc. for the Advancement of Material and Process Engineering. All rights reserved.