Consider and discuss an area in your supply chain that could be subject to a bullwhip effect, give an example of how this can happen and provide ideas on how to mitigate the effect.
Bullwhip effect is a situation detected by the supply chain where orders sent to the manufacturer and supplier creates a larger variance than the sales to the end user. In other words it is a wrong representation of demand which in turn leads to excess inventory resulting into waste.
A good example was a misinformed market after a fire outbreak, caused by the use of imported electrical cables. The right information was, construction companies can use both local and foreign cables but the foreign/imported cables must be certified by a special body on standardization and there was never a barn against the use of imported cables.
The locally made Electrical cables were scarce because it was completely bought out of market. After a month the market was flooded with locally made cables which didn’t move or sold as expected.
This is a case of improper communication between each link or stake holders in the supply chain which has resulted into in accurate forecast, and such over reaction to demand expectation i.e. ordering too much and producing too much as well.
A proper understanding of this concept will always help business owners and managers avoid costly pitfalls and a better supply chain.
This can be avoided through proper dissemination of information and transparency with all stake holders.
 
 

I want to further contribute on the above discussion, the differences between process mappings and supply chain mapping
Though the word mapping is common to both, however, Processs mapping is the unique way of using diagrams (flow charts) to illustrate the flow of process from the most perspective (macro) to the level of details (micro) required to identify opportunities and for improvement.
The essence of this is to see the workability of a process and to establish the working boundaries and limits and to put in place checks in order to improve efficiency.
For example, the process of constructing a building, the process starts from the sub-structure (the unseen part of the building, which includes the foundation, which can be normal foundation, raft foundation or pile foundation depending on the soil texture and characteristics, the number of  floors and other parameters) to the super structure, the seen part, which includes the beams, the couloms, the block walls, this is further divided into sections, to the roofing and finally finishing of the building.  
To achieve this, a lot of team work, brainstorming, inputs, ideas, communication and proper documentation is put into action.
Supply chain mapping on the contrary is engaging across the suppliers and sub contractors engaged on the building construction to documents the exact source of every material, every equipment engaged in erecting the building, e.g Electrical Sub-contractor, it involves the total knowledge of all the electrical materials, fittings, pippings, equipment engaged, likewise for all other sub-contractors and supplier engaged in the construction of the building.