Once you have your team members, you need to establish a clear and consistent process for forecasting retail sales. This requires defining the forecast horizon, which may depend on the seasonality, volatility, and lead time of your products and market; the forecast level, which may depend on the product categories, locations, channels, and segments that you want to analyze and compare; the forecast frequency, which may depend on the availability and reliability of your data as well as changes and uncertainties in your business environment; and the forecast method, which may depend on the data quality, quantity, and patterns as well as objectives and assumptions of your forecasts. You can use qualitative methods such as expert opinions, surveys, or focus groups or quantitative methods such as time series, regression, or machine learning. Additionally, it's important to define roles and responsibilities for each team member in the forecasting process with clear tasks, deadlines, and expectations while also establishing a communication and collaboration platform like a shared spreadsheet, dashboard, or software.