Given the scale, complexity and fragmented nature of the African continent, making well-informed choices about which markets to enter when and via which mode will be more critical than ever, according to Michael Lalor, EY’s Lead Partner Africa Business Centre.

Economic growth across the region is likely to remain slower in coming years than it has been over the past 10 to 15 years.

The International Monetary Fund’s (IMF) baseline projection for 2016 is now down to 3%, from what was a forecasted 6.1% in April 2015.

To support investors in adapting to a more uncertain environment and to assess variable opportunities and risks across the continent, the EY Africa Attractiveness Index (AAI) tool provides a balanced set of shorter and longer term-focused metrics.

The index helps to measure both likely resilience in the face of current macroeconomic pressures, as well as progress being made in critical areas of longer-term development, namely governance, diversification, infrastructure, business enablement and human development.

Lalor said it is important to recognize that this kind of indexed ranking does not provide a definitive assessment of any of these markets.

"There are obviously no absolute answers in searching for market potential. However, the Africa Attractiveness Index does provide a useful starting point for analysis and helps enable a strategic dialogue on growth priorities, risk appetite and investment criteria,” he said.

Although growth in region has relatively slowed, two-thirds of Sub-Saharan African economies are still growing at rates above the global average, and will remain the second fastest-growing region in the world for the foreseeable future.

South Africa comes first on the top 20 countries ranked on EY’s Africa Attractiveness Index, followed by Morocco, Egypt, Kenya and Mauritius.

The index shows that despite macroeconomic challenges (and a low-growth environment): South Africa still outperforms most other African economies due to relatively high scores across every other dimension (partly a reflection of the fact that the South African economy is more developed than any other African economy).

Kenya and Cote d’Ivoire benefit from strong economic growth performance and prospects, with both performing moderately well in terms of infrastructure and business enablement.

Botswana, Mauritius and Rwanda, although small markets, have all got a strong track record in areas of business enablement, social development and economic management, and so perform relatively well.

The North African countries of Egypt, Morocco, Tunisia, as well as Ghana, in West Africa, remain under some pressure economically, but have the advantage of a relatively business-friendly environment, good infrastructure and, in the case of Ghana, a strong governance track record.

Nigeria’s relative ”underperformance” on the AAI (ranked at number 15 overall) is perhaps somewhat surprising; while the Nigerian economy ranks as one of the most resilient in Africa, lower scores on the business enablement, governance and human development pillars are reflected in the overall ranking.

Similarly, other high-growth economies like Tanzania, Uganda and Ethiopia are all ranked in the top 10 in terms of macroeconomic resilience, but are also relative underperformers on other longer-term focused dimensions.

The index indicates that there will be different answers for different investors with different priorities; and as priorities change over time, so will the answers.

"A country’s macroeconomic resilience is also only one of several factors that investors and organizations needs to consider when conducting this kind of analysis," said Lalor.

"We are at an inflection point in terms of the structural evolution of most African economies; decisions made and actions taken now will determine, which of these economies consolidate the gains made over the past decade as a platform for sustainable growth in coming decades, and which of them begin to slide backward,” he said.

Sugan Palanee, Africa Markets Leader at EY, added that from an investment perspective, the next few years may be challenging: "This is not because the opportunities are no longer there, but rather because these opportunities are likely to be more uneven than they have been."

It is now more important than ever for organizations and investors, who sometimes place to great an emphasis on shorter term economic growth trends, to adopt a granular, fact-based approach to assessing investment and business opportunities for the long-term,” he said.