one is a plural and the other isn't. They mean the same thing.
what is sales forecast
The difference between a earthquake forecast and an earthquake prediction us that an earth quake forecast is when people say whats gonna happen and a prediction is what scientist think what might happen.
In statistics, a forecast error is the difference between the actual or real and the predicted or forecast value of a time series or any other phenomenon of interest.
A point forecast is a single answer e.g. it is going to rain at 1pm. An interval forecast is based on uncertainity e.g. it is going to rain between 12pm and 2pm. An interval forecast is used because a forecast is always precisly wrong and appromatley right, y.e. don't give a precise answer because it will be wrong.
Roughly, a Sales Plan is your strategie for achieving sales (purchases). A Sales forecast is an estimate at the beginning of a time period of how much one expects to sell.
A sales plan and a sales forecast are essentially the same, however the big difference is one is a set plan for the whole year. It is mostly used with larger corporations to single out units. A sales forecast is set at the store/branch level and is there to help with the changing situations (ie weather, natural disasters, and the such) A plan is what you are going to do and a forecast is what you think is going to happen. There should be a link between the two, but you may not have the capacity to make all that you could sell.
A forecast of Sales is calculating the amount of items you expect to sell over a certain period, whereas a Production forecast is calculating the amount of items you expect to produce over a certain period.
A forecast of Sales is calculating the amount of items you expect to sell over a certain period, whereas a Production forecast is calculating the amount of items you expect to produce over a certain period.
A forecast is what you think will happen to something which you can't influence yourself, like the weather or exchange rates. A plan is something in which you can influence the outcome, like "we'll try to get a 10% increase in younger customers by advertising outside schools".
Cash forecast is the estimate of the timing and amounts of cash inflows and outflows over a specific period (usually one year). A cash flow forecast shows if a firm needs to borrow, how much, when, and how it will repay the loan. Also called cash flow budget or cash flow projection.
the strength and frequency is the same
It's the difference between the yield on 10 year treasury bills and 10 year Inflation Protected T bills. The difference between the two implies what the market expects inflation to average over the 10 year period. When there's a big difference, inflation fears are high.