What should be the best and obvious quality of a Business Development Manager and why?

1. BRAND AMBASSADOR – The BDM is the brand ambassador, they need to know everything about the company and everything about the marketing – they are the brand personified. Is your candidate already, or willing to become, your brand ambassador?
2. CREATIVE – The second word in the title is development. This means developing new ideas and programs to help create more business and a better brand. This is where the Business Development Manager should build the most business; this is where they earn their stripes.
3. COMMON SENSE – A good BDM knows how to dress for their audience – You don’t walk on to a building site wearing a suit and expect to build credit with the foreman…
4. SELF MOTIVATED – All proactive people need to be self motivated otherwise things don’t happen – BDM’s need to believe in the brand and want to do things to build it.
5. CHARISMATIC – The BDM needs to be likeable. There’s no point attending a function and networking your way through ten people having all of them think you are arrogant and wouldn’t want to use your business. It’s no secret that BDM’s can be quite well paid, make sure that this never turns into arrogance; otherwise you’ll have a Brand Damaging Monster on your hands.
6. STRONG COMMUNICATOR – BDM’s need to be strong communicators. An idea needs to be pitched just as heavily internally as externally. The BDM will need to convince sales, marketing, admin, management, and after-sales support of the benefits of this idea… before an idea can be communicated to clients.
7. EXPERIENCE – Measured by specific field experience, not time. The best Business Development Manager’s will have experience in Sales, Marketing and Customer Service regardless of the industry – they should however also have specific experience in the particular industry that the plan to business develop in, because if they can’t talk the talk, people will see through them very quickly.
8. TEAM PLAYER – BDM’s need everyone on-side to make things happen. A lone wolf trying to do everything themselves, will not be effective. They need to work together with sales, marketing and management to ultimately create more customers and more sales.
9. INTEGRITY – Just because a BDM is not directly involved with the delivery of a project or a sale doesn’t mean that the sale going wrong won’t come back to bite them. As a BDM they need to say what they are going to do, and then do what they say they will.

I agree with all colleagues' answers just wanted to add that it must be a person, who can be proactive, must have very flexible mentality not restricted with existing frames, invent new ways of doing business, he must foresee the market situation,have wide and long term vision, I mean to see not only existing potential of channel or customer   but its future potential-for that purpose he must have on my opinion strategic thinking skills 

Planing and Execution

Deep Analysis of Changes and Trends and Making Inferences at the nick of the time

Innovation, creativity, communication skills, flexibility, leadership and analysing skills are the most remarkable qualities of the business development manager. 

Has strong listening and thinking skills. If he/she got a good input, he/she can deliver a successful output! 

Answering your question, in short

A successful BDM must have the knowledge about major issues to start up with   

1- His Company's capabilities of executing his vision and plans 

2- Marketing experience

3- Good Planer

4- Budgeting experience

5- Excellent listener

6- Negotiator

7- Strong personality

Regards

Georges G. Chaoul

The best and obvious quality of business development manager should be to achieve target and develop business and to do it it require convincing power and smart work.

well experienced 

strong communicator

charismatic persona

self motivated & honest integrity

does his homework & knows his product well - inside out

handles questions diplomatically with ease

1) Strategic Planning

2) Apropriarte Manpower Resources

3) Motivation of Worker in line with Company Policy

4) Leader Ship

5) To make Dynamic & Dedication of entire Team

6) To Prove the Distintive Product in World Market

The good reading of the inside and the outside inveronments by applying of SWAT analyses of the situation of his company and the market, becouse this is the best   way to understand the weakness, strenthses, aportunites and threats which the base of his developing plan .  

To understand the role of a BDM in the business and deliver the goods accordingly.