4 escaping employees
Author: Bo Zhang Xing citizen2yy@hotmail.com
12 If the employer is not a shepherd, the sheep is not himself. He saw the wolf, and he fled his sheep. The wolf grabbed the sheep and rushed to the flock.
13 hired, escaped, because he is an employee, does not take care of Tehu.
People are often the case; when you understand, learn, master, it's hard to accept other similar tools; for those tools that are not similar, people will naturally have a statement, they will say "" Your function is the same as our tool. "
People with minds will not be limited to one or two tools because they know that each tool has its targeted and limitations. The ancient words "the operation is specialized" is also the truth. So, in order to develop our project (product) development, we need special tools and technologies; for some key points in demand analysis, we also need to conduct more in-depth research. At present, there are a lot of project management tools, methods, and software on the market. Whether to use them, we can take a good trip?
We believe that mastering a variety of tools is a very good idea; and if you want to do demand work very well, it is best to grasp direct questions, face-to-face observations and negotiation skills. However, it is concerned about the concerns of tools, I have to remind the reader to pay attention to the complexity and syndrome of human thinking. We often see some of the ideal needs analysts to prepare a variety of tables and questionnaires, then write their needs specifications according to the text and data in the form; this section is to explain the method of this deadboard. It is not possible to get the need for a complete requirement.
[Delicious]
"Exploring Demand" book proposes that the exploration process is a traversal for decision tree from root nodes to the leaves node. I am here to make a simple explanation. In the following we will make a simple development.
The mathematical model is an abstraction of the real world. For example, the tree in real life begins with the roots, under the sunlight, according to the main, branches, fine branches, and leaves in such a level of such levels. Due to the limitations of mathematicians and programmers, our printing paper and writing habits are from left to right and from top to, so the mathematical model of the tree we get is turned on the roots, leaves The next look. Although this look is difficult, I believe that readers have been able to accept this model, the reason is that we have accepted some training from the middle school to the university, which in turn illustrates that we are in Chapter 1 "Thief And robbers "The arguments for the symbol system and mapping require training. The decision tree model is a mathematical model for linear decision theory. We borrowed an auxiliary tool for direct questions: its root node is the first blurred description of the problem. Each node represents a question or decision, while the arrival of the leaf node is the final solution. Obviously, a normal tree will not be a branch, and the same, our direct questions cannot be smooth. Every branching place will have a variety of bifurcation, and each choice means that it is given up another broadcaster.
Idealists believe that as long as each option is judged by the user, every decision is signed by the user, then their decision tree can quickly arrive in the leaves node safely. (This idea is to be, but this is a later words, there is no mention.) We are temporarily identifying the correctness and clearness of each judgment, which brings serious pressure to our decisions, each branch Will there be a clear user cooperation? This is a natural idea. We must inevitably join our own "experience", actually our assumption.
First, it is important to explain that the order of decision is very important. For example, if the customer wants a green bike, if you give him an orange bicycle, it may be easier to accept than a green truck. Therefore, the problem "What color is it?" And the problem "Is it a bicycle or a truck?" Should be asked later. The importance of the order is also reflected in it to reduce our decrease in repair errors. If you have learned the theory of information, then we can quantify the value of this order. The solution is a counterfeit behavior, which attempts to achieve the direction of anti-thermodynamics in the local area through human wisdom. Our information is this: Initially, a mixed problem has an infinite possibility, its amount of information is zero, its content is infinite, and its information entropy is also infinite. The answer to each question can reduce the possibility, reduce the aidity, improve the amount of information, and reduce the information entropy. For each problem, we can determine its quantitative weight values through experience or customer conference, which is the value of this problem, and it is also possible to see the amount of information. According to the optimal coding theorem, we can get the HUFFMAN code value corresponding to each problem. The length of this Huffman code value is the degree of emphasis on the issue.
The following table lists a direct question and answer in a typical design case. According to the customer's answer to 10 questions, does the reader have a plan for the problem that needs to be solved?
Serial number question Answer 1 What do we do? Design a transport device 2 What time limit? Complete 3 transportation within 18 months? How many people can you transport each time? What is the source of a 5 power source? Passengers provide power 6 in what kind of surface transport? It should provide transportation in a very hard flat surface to be transported to how far? More than 2 km. 8 The speed of the device? It can take 400 meters at least every hour. 9 What is the indicator of the failure rate? There is a maximum of one miles every three thousand miles. The failure cannot endanger the safety of the passengers. How much is the cost? It is not more than 200 yuan for each use.
[Lost Lamb]
After more than 1,000 professional system designers confirmed that the conversations in the above table are a good series. We can quickly make the possible choices of products:
1, skates.
2, bicycle.
3, tricycle.
Originally, we are very willing to think of battery cars, but because of the answer 5 answers let us abandon this safe green and fast transportation. Therefore, we chose a bicycle as an alternative.
Originally, we are also very willing to think of gliders, but because of the answer 6 answers let us give up the idea of soaring in this sky.
Obviously, the above three options can meet the above 10 conditions, and we noticed that these three transport equipment have a common point, that is, there is a wheel. In order to ensure that our design can be accepted by the customer, we divide the designers into two groups: small wheels and large wheel groups. Both groups of designers have completed creative wonderful solutions.
The small wheel group has submitted a multi-function slippery, which can use a convenient plug-and-play technology, and a strong slot is installed at the bottom of the slippery, which can be installed with a wide range of standard interfaces such as ice knives, rollers and chips. Additional accessories. Designers also announced the standard solution for the singing shoes standard slot, intended in the industry. In addition, additional pinr devices can greatly reduce the fault rate. The big wheel sets a compact, non-heavy, foldable tricycle, which can be taken away in the pedestrian travel bag.
Here is the scene when we showcase samples there:
Two customers come to watch our samples, they are full of praise to our creation, especially the might of the tricycle. However, one of them asked: "Please explain how this device is used in North slopes on Eger," We stay there. " Are you staying there? The customer explained: In their minds, it is a climber rescue equipment. The two of them are the town of Merlon Town and Biszzhen, because the economy of the two towns mainly depends on tourism and special mountaineering. In order to maintain the growth of tourism and ensure the mountaineering backgurer, the official guide of the village must rescue the climber trapped on the hillside. However, as people attach importance to life, the tour guides are increasingly unwilling to rescue the coarse climber, so their team is getting smaller and smaller. The aspects believe that the village's economy will be threatened unless there is a solution. Therefore, the arigation needs a rescue equipment so that they can try to climb the vertical height of 1500 meters north. When the climber must return due to poor weather, exhaustion, injury, fear or supply insufficient supply, this device can be put into use, with landing to a hard flat ground. This equipment can be rented in any village. Each rent will pay a certain deposit. The rental cost is 400 yuan each time, so that each rental village can get about 200 yuan of gross profit; of course, it is used to save lives. Obviously, our lost is far away.
Let's take back our way, customers answered our direct questions, and we have added a lot of assumptions to the program when building decision trees and explores solutions. E.g:
1. There is wheel.
2. Horizontal transportation device for hard surface transportation.
3. Will not fly.
4. This device is compact.
5. Highlights of the equipment.
6. The product has a lot, so the unit production cost is small.
Maybe we can remember:
With yourself with experience, we can't explain that we can grasp the relationship between "knowledge" and "demand".
[Evil in the world]
The previous example seems to be a bit martyrdom, but it can simulate the aidity of those who like to design the project in a small room; this is often happening in people who have just come out from the idealib ivory tower. In many actual cases, the degree of content is not so obvious, but the distribution is wide but there is no way.
Once, we found 121 places to be interpreted by different reviews in 121 places to be interpreted by different reviews in the review of the demand specification of an online banking system. This is just a page in the 886 page requirement specification specification. We can estimate that there will be 886 * 121 = 107206 in this demand. If our designers follow this demand, then these mixed points require them to make decisions through guess. So, how much is our probability of each guesses? - Winberg & Gaussian
We said that we need some additional tools and techniques to reduce aid; this is because "our orders are not good at discovering our ignored things." This psychological observation actually has seriously plagued our designers. For example, we can't see X-rays with the naked eye, we can't use your ears to hear ultrasound, we can't walk roaming the world.
Natural, we will not feel uneasy for the above shortage; then, why should we guide yourself not finding the content of natural ignore? It is because of the above shortcomings, people invented a variety of tools to succeed; in the same manner, we may also accept these tools and techniques for reducing mixing in demand analysis.
These tools and technologies we can find in "Explore Demand"; of course, if we wish, you may wish to pay attention to the sequel of this series of articles. [Warning]
1. Differentiation is everywhere, the designer is easier to think is that the solution in their mind is what the customer wants, and in fact, this often adds a lot of assumptions to customers. Even if we find that our solutions are far more than the customer know, don't overclock, or to persuade them, or find new customers who can accept your solution.
2. Directly ask questions, you can use a decision tree. However, pay attention to the answer to each question once a verbal and written confirmation, that is, write the answer to them, this can exercise your textual expression, which also reduces the mixed skills.
3. Responsible needs workers accept our thoughts, but their difficulties they work is not from customers, and they will come from their old colleagues. We must convince these people, the best way is to raise some examples of failure. But don't pay attention to not let the other party are embarrassed.
4, understand and accept its limitations, and also understand and accept the limitations of customers and colleagues.
