Internet involvement in world industries development as activities integration media motivate Medium Industries of Indonesia to compete with Big Industries local and international. Medium Plastic Industries of Indonesia which experienced increasing demand become opportunities in developing integration by applying ERP Open Source to integrate activities in industries. The tested mobility aspect had shown that ERP can be accessed inside referral company scope in stable time with CV under 10%. Machine maintenance which support production activities cannot be done perfectly and gives high cost also long downtime. By creating ERP Open Source with maintenance module, failure prevention can be estimated by Weibull Distribution on production machine component failures. ERP estimation resulted very small error approximately 4% rather than analytical calculation for MTTF value and calculated perfectly for PDF and failure probability value. This estimation gave downtime and loss cost reduction more than 20% for the referral industry. © 2020 Int. J. Mech. Eng. Rob. Res.