The REAL question is what is the ROI on using J2EE vs..NET? Which one will save you money down the road? Which one will offer you a support system down the road? If this is going to be that large of an application, which platform will be best for the hardware that you are serving (PDAs/PC's/etc)? Who is going to support this system once it's developed? How much post-development work is going to be needed? Would the customer rather be involved or let it plug-and-play? How much of an IT support system is going to be needed for this system? Which platform would be best for large groups? Which platform would be better for smaller groups? The customer most likely going to like the system that just "goes", besides the usual IT jobs of backups/etc. Which solution is more likely go get the customer to buy it? Do you want do make it so the customer would benefit from extensions to the product?
The other issue is risk management? Which system will likely fail? Which system will cause a rise in development costs that may have been avoided? Which system is easiest to develop on for your network? Which system is easiest to manipulate if the customer adds requirements as you go along?
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or even better, why not use SQL and easy JSP?
The REAL question is what is the ROI on using J2EE vs. .NET? Which one will save you money down the road? Which one will offer you a support system down the road? If this is going to be that large of an application, which platform will be best for the hardware that you are serving (PDAs/PC's/etc)? Who is going to support this system once it's developed? How much post-development work is going to be needed? Would the customer rather be involved or let it plug-and-play? How much of an IT support system is going to be needed for this system? Which platform would be best for large groups? Which platform would be better for smaller groups? The customer most likely going to like the system that just "goes", besides the usual IT jobs of backups/etc. Which solution is more likely go get the customer to buy it? Do you want do make it so the customer would benefit from extensions to the product?
The other issue is risk management? Which system will likely fail? Which system will cause a rise in development costs that may have been avoided? Which system is easiest to develop on for your network? Which system is easiest to manipulate if the customer adds requirements as you go along?