This Gantt chart Excel template brings an example about developing a new product. As you can see in the table, here you can list your specific schedule, started from planning a new product, doing research and development, production phase, to preparing all departments to sell the product. If you have different purpose, surely you just have to suit the plan with yours.
The advantage of using Gantt chart in Excel, you can also adjust it easily by suit the table with your real life condition. It will provide you a realistic schedule to be finished.
By using this Gantt chart Excel template which is created by Gantt-Chart-Excel.Com, you can also compare your plan and execution, so you'll be able to create better plan for the next business plan.