企业战略是指企业在追求长期成功和可持续发展的过程中制定的行动计划和目标。为了更好地实施企业战略，通常会将企业战略分为几个层次。这些层次是关联和衔接的，相互作用，以实现企业整体发展的目标。

首先，最顶层的层次是企业级战略。企业级战略是指高层管理者制定的关于整个企业范围的目标和方向的决策。它主要关注企业如何在整个市场环境中取得竞争优势，并确保企业的长期生存和成功。企业级战略需要高层管理者对外界环境进行深入的研究和分析，包括市场趋势、竞争对手和消费者需求等因素。通过明确企业的核心竞争力和未来发展方向，企业可以制定出有效的企业级战略。

The first level of enterprise strategy is corporate strategy. Corporate strategy refers to the decisions made by top-level managers regarding the overall goals and direction of the entire organization. It focuses on how the company can gain a competitive advantage in the market and ensure its long-term survival and success. Corporate strategy requires in-depth research and analysis of the external environment, including market trends, competitors, and consumer demands. By defining the company's core competencies and future development direction, effective corporate strategies can be formulated.

接下来，企业级战略下一层次是业务单元级战略。业务单元级战略是指对企业不同业务单元或产品线的规划和管理。每个业务单元都有自己的目标和资源分配，需要根据企业级战略来确定适合该业务单元的战略。业务单元级战略需要从市场细分、产品定位、竞争策略等方面进行考虑，以满足消费者需求并取得盈利。

The next level below corporate strategy is business unit-level strategy. Business unit-level strategy refers to the planning and management of different business units or product lines within the organization. Each business unit has its own goals and resource allocation and needs to determine a strategy that aligns with the corporate strategy. Business unit-level strategy needs to consider market segmentation, product positioning, competitive strategies, and other factors to meet consumer demands and generate profits.

在业务单元级战略之下，还有功能部门级战略。功能部门级战略是指针对企业不同功能部门制定的战略计划。这些部门包括销售、市场营销、人力资源、财务等。每个功能部门都有自己的任务和职责，需要确定与企业级战略和业务单元级战略相一致的战略目标和行动计划。

Below the business unit-level strategy, there is functional department-level strategy. Functional department-level strategy refers to the strategic plans formulated for different functional departments within the organization. These departments include sales, marketing, human resources, finance, etc. Each functional department has its own tasks and responsibilities and needs to determine strategic goals and action plans that align with the corporate strategy and business unit-level strategy.

最后，企业战略的底层是操作层级战略。操作层级战略是指对具体业务操作的战略规划。它关注如何利用资源和实施活动来实现企业战略的目标。操作层级战略通常由中层管理者制定，以指导具体的实施步骤和决策，确保顺利实现战略目标。

Lastly, the bottom level of enterprise strategy is the operational level strategy. Operational level strategy refers to the strategic planning for specific business operations. It focuses on how to utilize resources and carry out activities to achieve the goals of the enterprise strategy. Operational level strategies are typically developed by middle managers to guide specific implementation steps and decisions to ensure the successful realization of strategic objectives.

总结而言，企业战略分为企业级战略、业务单元级战略、功能部门级战略和操作层级战略几个层次。这些层次之间相互关联，并且共同推动企业的整体发展和成功。通过逐层制定和落实战略，企业可以更好地应对市场变化，提高竞争力，并实现长期可持续发展。

In summary, enterprise strategy is divided into several levels, including corporate strategy, business unit-level strategy, functional department-level strategy, and operational level strategy. These levels are interconnected and collectively drive the overall development and success of the enterprise. By systematically formulating and implementing strategies at each level, companies can better respond to market changes, enhance competitiveness, and achieve long-term sustainability.