Deploying a custom workinflow from SPD to a Prod environment

If you are creating a custom workflow or a resuable workflow through SPD 2010 for the first time, you'll end up with a question about how to move the same to production. I tried the following :

1. Create the workflow in SPD

2. Save it as Template (Saves a soln file in the Site Assets folder)

3. Download the wsp file - Ref - http://technet.microsoft.com/en-us/library/ee662509.aspx

4. Move the wsp file to prod and deploy it - Ref - http://technet.microsoft.com/en-us/library/ff607872.aspx

But it didn't deploy the same in my Prod environment. Well, I should say it deployed but wasn't available on my Workflow list

Finally, I opened the prod site from SPD and published it directly. It worked without flaw.