The Application segmentation categorizes market demand by the therapeutic modality under scrutiny: viral vector QC, non‑viral vector QC, cell product QC, and process analytics QC. Viral vector QC dominates the landscape, covering lentiviral, adenoviral, and AAV platforms, where stringent purity, potency, and residual host DNA testing are mandatory, accounting for the largest revenue slice. Non‑viral vector QC, though smaller, addresses lipid nanoparticles and plasmid DNA, requiring distinct analytical workflows for size distribution and encapsulation efficiency. Cell product QC targets autologous and allogeneic cell therapies, focusing on viability, phenotype, and genetic integrity assays. Process analytics QC spans in‑process monitoring tools such as bioreactor sensors and PAT (Process Analytical Technology) systems, facilitating real‑time adjustments. These application sub‑segments collectively define the market’s structure, with each contributing proportionally to the total market size in the Cell and Gene Therapy Manufacturing Quality Control market taxonomy.