The earliest efforts were made in the areas of canning, Alexandria, munez and spaurous. 3. Remove the gasoline pump in the car Edwards and bell's point of view This approach periodically revised future plans based on the implementation of the plan and changes in the environment, and moved forward over the period to integrate short-term and medium-term plans organically. As it is difficult to accurately predict the future of the plan work affect organizational survival and the development of economy, politics, culture, technology, industry, customers and other factors change, and as the extension of planning period, the uncertainty is greater and greater. Therefore, the implementation of a planned implementation of a mechanical, or mechanical, and static execution of a strategic plan by a number of years ago may result in significant errors and losses. Rolling planning can avoid the consequences of this uncertainty. The specific approach is to make plans in a very short and thin way. The fund's fourth consultation underlines the enormous uncertainty facing Britain in the ambitious task of negotiating an exit from the eu.