Inclination or deviation related well problems are well known problems during drilling operation. These problems are like tool failure, stuck pipe, logging problem, casing running challenge and borehole cleaning problem. If they are not diagnosed in their early stage of development, they result into non-productive time (NPT). The use of RTDD and both actual and planned data from survey files were very important for determination of both inclination levels and deviation of the well path. The analysis presented in this master thesis was based on previous literary study and RTDD and/or survey file data computations. The main objective of this master thesis was to eliminate inclination and deviation related well problems in the future such that it was necessary to create data agents in Matlab which reported both inclination level and deviation using real time drilling data (RTDD) and both actual and planned data from survey files.From the data analysis using Matlab, estimated inclination, projection of each well in both 2D and 3D, variation of inclination and azimuth with depth, true vertical depth variation with measured depth, dogleg severity variation with measured depth, vertical and horizontal hole deviations at the end of a well and finally both vertical and horizontal hole deviation logs were determined. Moreover, outcomes associated with variation of above parameters were explained. It was observed that both inclination and deviation calculated from RTDD and survey file data revealed the reality of the models for each wellbore as there were similar trends and nearly equal values of both actual and estimated inclinations. Also some deviation related well problems observed at some depths which have high deviation. Therefore, determination of these parameters during drilling was of vital important in order to take prior measures before installation of casing and other production equipment. Finally the model selected to estimate inclination was valid as could provide values nearly equal to actual values, the number of loops which were used in inclination classification agent prolonged agent running time and from hole deviation logs created a driller could be able to control deviation during drilling.