There is a 15% difference between the two quotes, and the one that looks cheaper may not actually save you. The method of total cost of ownership accounting is to convert the four types of expenditures other than the purchase price into the same time frame, and then put them into a table for comparison.
How to split the five-yuan expenditure
- Procurement cost: unit price multiplied by quantity, plus coding, test records, freight and taxes
- Spare parts cost: The proportion of random spare parts multiplied by the unit price, usually 5% to 8% of the quantity in use is reserved.
- Operation and maintenance man-hours: man-hour consumption for spot inspection, replacement and on-site review of goods, estimated as 2 man-hours at a time
- Downtime loss: the length of business affected by a single port failure, which can be converted into expenses according to the project level
- Lifespan and replacement: replacement frequency and port speed upgrade path within the agreed service life
The spread often reverses after a split. toPCI-EX16 100G single optical port fiber optic network card (Intel E810 chip)Compared with the low-speed solution, for example, in addition to the unit price of the board, the cabinet space caused by the module, jumper and port density is also included.
The conversion caliber should be unified
Unify the five yuan expenditures into the same service life, usually 5 years. The proportion of spare parts is adjusted according to the failure rate and on-site accessibility: it can be higher for unattended stations and remote lines, and it can be lower for urban computer rooms. Use the company's internal settlement standards for labor unit prices, do not use market quotations, otherwise cross-project comparisons will not be possible.
Draw conclusions using a comparison table
Write the expenditure items in the left column of the table, one column for each of the two plans, and the differences and assumptions in the last column. All assumptions are clearly written out, such as 5 years, 6% spare parts rate, and on-site replacement twice a year, so that others can question the assumptions during the review instead of arguing about the conclusions.
After the calculation is completed, there is a common language for program selection. EB-LINK can provide device life grades and test data according to the same caliber. To communicate with the cost sheet template, you can dial 0755-83179002. For reference cases, see100G optical fiber interconnection upgrade between buildings in a large data center in East China.