Identity as a service is super nice because it allows the administrators to maintain access to restricted areas all in one place. Identity-as-a-Service is also nice because you can use it to give users access to certain cloud based applications, maintaining the usage of the applications on a per user basis gives an accurate record of what the company is using and what they are not using as far as Software-as-a-Service applications. before SaaS, a company would have to purchase a number of licenses for the application and keep that list of license keys somewhere safe on their network so that the application could be installed and licensed appropriately, and then someone would have to make sure that the licenses were up to date and that each person that had the application installed on their machine actually had a valid license for their copy of the application. That all seems daunting just typing it out. but now we have Software-as-a-Service which allows the company to grant the authority for certain users to be able to install/use the application and then if the user actually uses the application, the company is charged for the usage of the application. In this scenario, if the user doesn't install/use the application during that billing cycle the company is not charged for the usage(or lack thereof), there are no licenses to keep track of, and there is usually a nice way to keep track of the people using the application, so there is a nice way to audit the usage of applications.
Another nice thing about Software-as-a-Service is the painless upgrades, the software provider handles upgrading the software so you don't have to maintain the update schedules for the application, and if for some reason something goes wrong with the application's update, the software company already knows and works on a solution, this process is nearly seamless. If there is a hot-fix for some reason all you need to do is refresh the application.
The biggest benefit I see for a company to switch to software-as-a-service is that in the past they would have had to buy a Company License to run certain types of server based applications on their machines or even regular applications they would buy a Company License and it would give them x amount of licenses, this wasn't very economical for some companies. Let's say the company had 30 users that needed Application X and a company License gave them 25 application (licenses for 25 machines) if they wanted more they had to purchase another Company License because of the way that they are using the application this is the only option. they would be wasting 20 licenses or wasting the money they spent on that company license. With Software-as-a-Service the company pays per user using the application so they only pay for 30 people using the application, if someone else needs to use the application, then they pay for one more "use" they would pay for 31 people using the application.
this is really a no brainer for just about any company, why pay for more electricity then you are actually using? Why pay for 100,000 gallons of water when you have only used 20,000 gallons of water? Why pay for 25 gallons of gas when you only pumped 15 gallons of gas into your car? Same thing with the upgrades, only this is a little ahead of everything else because the second they release an upgrade to the application you get that upgrade, you get the better version of the application, this would be comparable to someone upgrading your washer and dryer every time there was a breakthrough in saving energy that made your washer and dryer use less energy, only it happens for every washer and dryer that the company sold, instantaneously at the same time across all the units.
The Benefits of SaaS - Learn Why Software as a Service is the Future - salesforce.com. (n.d.). Retrieved August 27, 2016, from http://www.salesforce.com/saas/benefits-of-saas/
Sylos, M. (2013, September 18). Top five advantages of software as a service (SaaS) - Thoughts On Cloud. Retrieved August 27, 2016, from http://www.thoughtsoncloud.com/2013/09/top-five-advantages-of-software-as-a-service-saas/
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