According to the Case study Alpha uses an adaptive or polycentric approach. The reason for this is alpha encourages local leaders to make decisions and enhances cultural sensitivity and local market knowledge. However i think that choosing a suitable approach depends on company needs, goals and objectives. But i believe multinational companies can choose between polycentric and geocentric.
Polycentric - an approach suitable for multinational companies who are focusing on local responsiveness and local leadership.
Geocentric - an approach best for companies expecting for a strong global interrogation, global presence , consistency and flexibility.