
Virtual
Private Networks
Calculating Return On Investment
For Remote Access VPNs - continued
Scenario 2:
Mid-size Enterprise with 800#
/ international remote access
This customer has 400 employees: 200 that require access from home (mix
of local and toll calls, 20 hours/month/employee), and 200 that require
access from the road (800# and international calls averaging 30 cents/minute,
5 hours/month/employee). There are currently three branch offices connected
by Frame Relay to corporate headquarters, and each office now operates
its own modem pool. Assume the customer wants to install ISP-managed CPE
and DSL Internet access at all four offices, in preparation for building
a site-to-site VPN. The monthly price tag for in-house remote access was
$37K. A remote access VPN service at $50/month/employee will run $21K,
a savings of 43%. Initial investment of $50K can be recovered in three
months, and will have laid the groundwork for a site-to-site VPN.
|
|
In-House RAS |
Outsourced VPN |
|
Total Users
|
400 |
400 |
|
Local Usage (Hrs/Month)
|
2,000 |
2,000 |
|
Long-Distance Usage (Hrs/Month)
|
2,000 |
2,000 |
|
800# / International Usage (Hrs/Month)
|
1,000 |
1,000 |
|
Monthly Telco Charges
|
$30,000 |
$0 |
|
User Internet Access ($20/month)
|
$0 |
$8,000 |
|
Backbone Internet Access (T1)
|
$0 |
$1,000 |
|
Monthly Connectivity Fees
|
$0 |
$9,000 |
|
RAS Equipment Maintenance 1
|
$800 |
$0 |
|
In-House User Support Staff 2
|
$5,000 |
$0 |
|
RAS Equipment Depreciation 3
|
$1,111 |
$0 |
|
VPN Remote Access (+$40/user)
|
$0 |
$12,000 |
|
Monthly Infrastructure Cost
|
$6,911 |
$12,000 |
|
Total Monthly Cost
|
$36,911 |
$21,000 |
|
Savings per Month
|
|
$15,911 (43%) |
|
Months to Recover Investment
4
|
|
3+ |
1. Current RAS equipment maintenance 16 hours/month @
$50/hour
2. Current user support 15 minutes/user/month @ $50/hour
3. 4 * 50-port RAS Servers were purchased for $40K, fully depreciated
over 36 months
4. VPN Startup Fees = 4 * $10K CPE, plus $10K for client installation
(total: $50K)
Summing up
Clearly, there are many variables involved in any such calculation, not
the least of which is the monthly charge for VPN remote access service.
But even if you quibble with individual parameter values, these example
calculations are useful to illustrate a few general conclusions.
- Monthly telco charges dominate remote access costs and account for
nearly all of the margin that lies between baseline Internet access
fees and the premium that can be charged for VPN services.
- Up-front customer investment can be recovered quickly in many cases,
leaving room to purchase CPE under installation fees. Recurring charges
must include maintenance and depreciation for "managed CPE" owned and
operated by the ISP. Alternatively, customers can own or manage their
CPE, but this may dilute the perceived benefits of VPN outsourcing.
- Remote access user support costs can be significant. Support isn't
reduced by introducing a VPN, but it can be outsourced. These examples
include outsourced support in the monthly user fee, but a separate support
contract might be negotiated instead -- or the customer might retain
in-house "help desk" staff, relying on the ISP for second-tier support.
- Deploying VPN services may or may not require change to the customer's
backbone network: for example, to increase capacity of site-to-site
connections or to add Internet access at branch offices. Such changes
represent additional sales opportunities and should not be overlooked.
On-line VPN "cost calculators" can be found at many equipment supplier
and service provider web sites. I recommend experimenting with several.
Here are two links to get you started:
Concentric
VPN Seminar Cost Savings
Shiva Remote Access Analysis
Tool
Whether you use an on-line calculator or your own home-grown spreadsheet,
the ability to project customer savings and return-on-investment is must-have
marketing tool for any ISP in the VPN market.
End
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Read other VPN articles by Lisa
Phifer
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