Final answer:
Harry Johnson Tractor Corp. has completed the strategy implementation phase of their international planning process by creating a detailed marketing plan with budgets and sales and profit expectations for the South African market.
Step-by-step explanation:
Harry Johnson Tractor Corp. has just completed the strategy implementation phase of the international planning process by finalizing a marketing plan for entering South Africa, which includes budgets and sets forth sales and profit expectations. This phase involves putting the strategic plan into action and operationalizing the business's goals for their international market entry. Establishing this marketing strategy is essential to ensure that the operational aspects such as product distribution, promotional activities, and pricing tactics align with the overall strategic objectives of the company entering a new market.