Exactly what business are you in?
Do you have an army of HR professionals, an array of people looking after accounts payed and received?
No? Well, why do you have an extensive group of IT professionals?
If you don’t and your IT isn’t working properly – that may be the reason. But that’s a topic for another day.
Asking from a different perspective, how may applications do you have? How complex is your business model?
Could your back-office functions be all done in one package and that package hosted on the internet?
You see, SaaS – software as a service – is just that. It’s a package, an application that is hosted by a vendor you trust that does the work you need it to do. Instead of that application being hosted internally, with all the attendant support and upgrade needs, all of the “lights-on” activity is taken care by that third party.
But, as with everything in IT, its just not that simple. There is the security of your data to consider. There are the linkages to other applications. There are some considerations around how close that data is in that potentially hosted application to your key intellectual property, how critical it is to your continued operation.
SaaS, that top layer, may be for you.
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IT Considerations 
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