Difference between revisions of "Periodic Payment License"
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| − | + | The '''Periodic Payment License''' (PPL) from [[Digital Equipment Corporation|DEC]] was a kind of software leasing system, which was introduced about 1987. | |
| − | Instead of buying a relatively expensive traditional '''Paid-Up''' license (with unlimited validity), | + | Instead of buying a relatively expensive traditional '''Paid-Up''' license (with unlimited validity), one could start with a one-time '''Initial License Charge''' and monthly '''Periodic Payment License''' (PPL) fees. |
| − | Which of the two options leads to lower overall costs depends on the period of use. | + | Which of the two options leads to lower overall costs depends on the period of use. Let's have a look at an example: |
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| − | Let's have a look at an example: | ||
Q2001-1P [[VAX 8550]] [[VMS]] INITIAL LICENSE FEE 1 x 3,150 = 3,150 | Q2001-1P [[VAX 8550]] [[VMS]] INITIAL LICENSE FEE 1 x 3,150 = 3,150 | ||
Latest revision as of 23:08, 13 November 2025
The Periodic Payment License (PPL) from DEC was a kind of software leasing system, which was introduced about 1987.
Instead of buying a relatively expensive traditional Paid-Up license (with unlimited validity), one could start with a one-time Initial License Charge and monthly Periodic Payment License (PPL) fees.
Which of the two options leads to lower overall costs depends on the period of use. Let's have a look at an example:
Q2001-1P VAX 8550 VMS INITIAL LICENSE FEE 1 x 3,150 = 3,150 Q2001-JP VAX 8550 VMS MONTHLY PERIODIC PAYMENT LICENSE FEE 41 x 1,134 = 46,494 Total = 49,644 Q2001-UZ VMS PAID-UP LICENSE 49,875
The break-even point is reached after 41 months (three years and five months) of use, from then on the "perpetual" license is cheaper, with depreciation and interest not taken into account.
