you would use a restricted approach when interest is likely to be high. The buyer needs a method of de-selecting unsuitable bidders and creating a shortlist of acceptable organisations.
For complex requirements you could use both an open or restrictive tender- the difference between the approaches is about how many bids you're likely to get rather than the complexity of it.

Greg needs to use a gearing ratio. Gearing is a measure of how the business is being funded and is based on the ratio of debt to equity Gearing comes up a lot in the exam. Also make sure you know what Return on Investment, Acid Test and EBITDA are.
Return on Investment (ROI): How to Calculate It and What It Means (investopedia.com) EBITDA: Definition, Calculation Formulas, History, and Criticisms (investopedia.com) Acid-Test Ratio: Definition, Formula, and Example (investopedia.com)

The current ratio is calculated by dividing total current assets by total current liabilities. Here, dividing $300 by $150 gives a current ratio of 2.0, indicating that the supplier has adequate current assets to cover its short- term obligations, an important factor in supplier evaluation.

Incoterms are grouped as E (Ex Works), F (Free Carrier), C (Carriage Paid To), and D (Delivered Duty Paid), reflecting various stages of responsibility transfer between buyer and seller. Understanding Incoterms is critical for responsible sourcing, as it clarifies logistics and cost responsibilities.

The withholding of passports is a potential indication of modern slavery, and the offer of a discount to avoid reporting this is a form of bribery. Reporting these ethical concerns aligns with responsiblesourcing practices and is critical for maintaining a supply chain free from human rights abuses.