Now, let us look into the merits and demerits going for either standard equipment or special equipment. Let us compare the merits and demerits of both these options. So, when you go for the choice of standard equipments they are basically commonly available because there will be lot of manufacturers available for the standard equipments. Because it is used commonly in so many construction project sites and its delivery will also be very quicker. And if your equipment breaks down due to some reason the spare parts availability will also be very quicker. And another advantage is it can be used on more than one project that is also one of the advantages. So, your project will not get delayed due to the non availability of this machine or non availability of the spare parts because these are commonly easily available. And another important thing is at the end of the useful life of the machine. It is easily possible to dispose it or sell it at a reasonable price that is also possible with the standard equipments. But the issues with the special equipment which are custom made only for a particular project is it may not be easily readily available. So, we have some waiting time for the machine. So, it is delivery may not be quicker because it is being custom made for a particular project. Even if the equipment is going to break down the spare parts availability may not be easier. It may get delayed and that delay may even affect the project completion. And at the end of the useful life of the machine, we cannot assure that there will be buyers for this special equipment, it is not being commonly used in all the projects. So, these are some limitations of the special equipment that is why before you plan for the purchase of this special equipment we have to work out the economics of the costs associated with the machine. And the profit which are likely to generate by purchasing this machine whether there is likelihood of future projects which can make use of this special equipment. All these things we have to plan rigorously and then plan for the purchase of the special equipment.

So, what are the other general points which are to be kept in mind while planning of the equipment? As I told you, the task of the project planner is to choose the right machine for the right job. It is really a challenging task now a days as there are so many options available even for the same job in the construction equipment market. So many construction models are available even for a same particular function. So, many construction operations can be performed by more than one type of equipment. So, now, how to make the decision? As I told you in the beginning of this lecture, we should go for the economical method of attack. If 2 equipment can give you same end result, choose economical method of attack for the given project conditions. So, the project conditions also should be taken into consideration while selecting the equipment not only based on economics.