Happy New Year Fellas!
I've been reading this thread for a few days now and thought I would chime in and share with you my personal thoughts when changing pin positions. I have been a superintendent at 3 golf courses over the past 23 years and have worked at a total of 5 golf courses over the past 35 years, all of which I have changed pin positions countless times.
Firstly, I am moving the pin to spread out the foot traffic and wear pattern around the prior hole location. Where I move the next pin to is a factor of several things such as the expected weather, expected volume of play, is it a tournament or casual golf, and more.
If rain is expected I may seek pin positions on the higher points and avoid lower lying areas that may collect water. If we are expecting a higher volume of play I may seek "easier" pins by remaining closer to the middle and avoiding pins near the edges. If it's a tournament (assume the pins were preselected and marked in advance) we are probably selecting a variety of pins that will provide challenge by tucking some closer to the edges along with using the front and back too.
When the weather is hot and humid and the greens a little slower I may place pins in areas normally considered to be too dicey under normal green speeds. If the volume of play is expected to be light we may utilize more difficult pins if necessary to properly spread out the wear patterns... because a lower volume will not slow down play too much compared to a busier day.
If I am trying to protect a green for any number of reasons I will place the pin about 4 or 5 paces from the front edge because the average golfer is almost always short with their approach shots meaning most balls will land short and then the foot traffic is mostly confined to the front of the green protecting 2/3 to 3/4 of the putting surface behind the hole.
If the front needed protecting then a temporary green would be appropriate.If we are in a slow time of the season and play was limited or non existent the previous day we may elect to not change the pins at all. Sometimes we may go multiple days depending on the weather before we change pin positions. Winter time can also require some creativity as it relates to areas prone to frost. Pins may be moved to the sunny side of greens or away from certain areas prone to linger in the shade.
When I was in graduate school the golf course where I regularly played cut two holes in each green during the winter and as groups played through you moved the flag from one hole to the other to keep the foot traffic spread out. I have played other courses in the winter with as many as three holes per green for this same purpose.
Again, although moving the pin creates variety and alters strategy in playing a hole from one day to the next, the primary reason for moving the pin is to preserve and protect the putting surface by spreading out the wear from concentrated foot traffic. And of course, we are always looking for that devilish spot just to make you miss.