và các chuyên gia tài chính. Đánh giá tài chính thực hiện bảo trì thường được chia thành các giao dịch đơn lẻ hoặc nhiều giao dịch. Nếu thanh toán hoặc chi phí giảm nhiều, họ có thể là thống nhất hoặc khác nhau. thống nhất Nguyên nhân mất cân bằng ròng rọc hoặc lập dị. Khuyết tật trong vành đai. Cân bằng Hành động sửa chữa hoặc thay thế ròng rọc. Thay thế vành đai. | 38 An Introduction to Predictive Maintenance Table 2-5 Capital Recovery Uniform Series with Present Value 1 CP pji 1 L Ì V 1 i -1 Periods Interest 20 1 2 4 10 15 1 2 .508 .515 .530 .576 .615 .654 3 .340 .347 .360 .402 .438 .475 4 .256 .263 .275 .315 .350 .386 5 .206 .212 .225 .264 .298 .334 6 .173 .179 .191 .230 .264 .301 7 .149 .155 .167 .205 .240 .277 8 .131 .137 .149 .187 .223 .261 9 .117 .122 .135 .174 .210 .248 10 .106 .111 .123 .163 .199 .239 11 .096 .102 .114 .154 .191 .231 12 .089 .095 .107 .147 .184 .225 18 .061 .067 .079 .120 .163 .208 24 .047 .053 .066 .111 .155 .203 36 .0033 .038 .051 .094 .151 .200 48 .026 .032 .045 .092 .150 .200 60 .022 .028 .043 .091 .150 .200 and finance experts. Financial evaluation of preventive maintenance is divided generally into either single transactions or multiple transactions. If payment or cost reductions are multiple they may be either uniform or varied. Uniform series are the easiest to calculate. Nonuniform transactions are treated as single events that are then summed together. Tables 2-1 through 2-5 are done in periods and interest rates that are most applicable to maintenance and service managers. The small interest rates will normally be applicable to monthly events such as 1 percent per month for 24 months. The larger interest rates are useful for annual calculations. The factors are shown only to three decimal places because the data available for calculation are rarely even that accurate. The intent is to provide practical applicable factors that avoid overkill. If factors that are more detailed or different periods or interest rates are needed they can be found in most economics and finance texts or automatically calculated by the macros in computerized spreadsheets. The future value factors Tables 2-1 and 2-3 are larger than 1 as are present values for a stream of future payments Table 2-4 . On the other hand present value of a single future payment Table 2-2 and capital .
