Your plant has several custom-built production machines that use various plug-in circuit boards. The standard practice has been to troubleshoot to the board level and then replace the entire board.
Taiyo Yuden has added the EIA 0402 size (1.0 x 0.5 x 0.5mm) to the lineup for CFCAP&#174, super low distortion multilayer ceramic capacitors, joining the existing 1206, 0805, and 0603 case sizes.