Fermilab, May 15, 1999
Dear Colleague,

   A couple of weeks ago Jim Christenson resigned from his positions as
Co-Project Manager of the D0 Upgrade Project and from his position as
Head of the D0 Project organization within the Particle Physics Division
at Fermilab.

  Status
  ------

   Two weeks ago, the Spokesmen informed Ken Stanfield that they
designated Harry Weerts and Mike Tuts as the two project Managers for
the D0 Upgrade. Both Mike Tuts and Harry Weerts are/will be Guest
Scientists at FNAL. A copy of the letter of appointment including an
expression of support for D0 can be found on the D0 internal WEB page:
 http://www-d0.fnal.gov/newd0/d0atwork/general/d0_private/d0_documents.html
A simple text version of the letter is attached below. The letter 
clearly reaffirms the importance of D0 within overall Fermilab 
priorities and the commitment Fermilab has with respect to getting 
D0 ready for Run II.

   Hugh Montgomery will be appointed Head of the "D0 Project" organization 
by the Head of PPD, John Cooper.

   It has been agreed that the names of Hugh Montgomery and Harry Weerts, 
will appear in the Engineering & Technical Teams organization at the head 
of the "D0 Team". This is motivated by two concerns:

   - this team is the major complement of PPD effort applied to the 
     D0 Upgrade Project and as such the arguments of a Project Manager
     are vital. 

   - there are concerns for the careers of the Fermilab employees over a 
     longer term than the D0 Project per se and therefore a long term/full 
     time FNAL employee is needed.  

Hugh Montgomery and Harry Weerts will continue as Co-Spokesmen of the D0
Experiment. 

          
  Discussion
  ----------

   The choice of the lineup described above was driven by a complex set of
circumstances.
    
   The reaction of members of the Collaboration to the plan varied
considerably. On the one hand it was felt natural that a Spokesman turn 
to help the currently most important aspect of D0 activities, on the
other hand it was pointed out that, at least on paper, we are reducing
by one the number of people doing the higher management tasks in D0. 

   Given the DoE Review of FNAL (May 5), the von Rueden Review and the
Lehman Review followed by the PAC in Aspen, all during the month of June,
D0 needs to be presented adequately and in an organized manner.
The present organization is in place for at least that time.

   As a collaboration we have an opportunity to (re)examine 
the way we do business. For example this year is the election year
for the Spokespersons.

   We can imagine that there are certain things that the Project Managers
and/or Spokesmen might do in this situation, for example:

     -- devolve more responsibility on the existing sub-project managers and
        other components of the collaboration already in existence.

     -- appointment of Deputy Spokespersons

     -- appointment of Deputy Project Managers

   One could ask whether the current Upgrade Project Management structure 
and people is appropriate for the final year before roll-in.

   We have no set timetable for conclusion on the discussions within D0 but
we imagine that the Workshop in Seattle will be an important forum. In
the meantime, there are considerations by the Institutional Board Chair
and Deputy Chair of a special Collaboration Meeting which would
disseminate information and perhaps instigate the discussion.

   Conclusion
   ----------

   In conclusion, we would like to thank the Collaboration for its many
expressions and manifestations of support, both moral and material over
the last couple of weeks.

   We hope that by the end of June, the von Rueden Committee, the Lehman 
Committee, the Laboratory, DoE, NSF, but most importantly D0 will be
convinced that all aspects of D0 are healthy and on track for Run II.

                                        Sincerely,

                                    Hugh Montgomery & Harry Weerts
                                    Co-Spokesmen

*********************************************************************
Attachment:  Appointment letters of Project managers from K.Stanfield
             in plain text form only.

	May 6, 1999

Philip Michael Tuts
Nevis Laboratory
Columbia University
P.O. Box 136
Irvington, New York 10533

Dear Mike,

	The DZero Project, as part of the Tevatron Collider Run II 
program, shares the Laboratory's highest priority with CDF and the Beams 
Division Run II effort.  At this time it is necessary to change the 
management structure of the DZero Project in order to ensure continuing 
strong and capable leadership required to successfully complete the 
project.  The DZero collaboration, represented by their spokespersons, 
Hugh Montgomery and Harry Weerts, has recommended that you continue as 
Co-Project manager.

	I have enthusiastically accepted this recommendation and ask that 
you agree to continue as DZero Co-Project Manager along with Harry 
Weerts.  The Laboratory shares the collaboration's confidence in your 
abilities to provide the leadership so necessary to bring the DZero 
Project to completion next spring for the initiation of Run II.  We are 
all committed to having two complete, complementary collider detectors 
to explore the new mass region which will be opened with over 2 fb-1 of 
data.

	I wish you the best and commit to making every possible effort to 
work with you, Harry and the collaboration to bring success to DZero.

			Sincerely,


			K.C. Stanfield

Cc:	H. Montgomery
	J. Peoples
	H. Weerts
	M. Witherell
	J. Cooper
	R. Wunderlich,DOE-FERMI
	J.R. O'Fallon, DOE-SC
	M. Goldberg, NSF

---------------------------------------------------------------
	May 6, 1999

Hendrik Weerts
Michigan State University
Department of Physics & Astronomy
East Lansing Michigan 48824

Dear Harry,

	The DZero Project, as part of the Tevatron Collider Run II 
program, shares the Laboratory's highest priority with CDF and the Beams 
Division Run II effort.  At this time it is necessary to change the 
management structure of the DZero Project in order to ensure continuing 
strong and capable leadership required to successfully complete the 
project.  The DZero collaboration, represented by their spokespersons, 
Hugh Montgomery and you, has recommended that you become a Co-Project 
manager along with Mike Tuts.

	I have enthusiastically accepted this recommendation and ask that 
you agree to take on these additional responsibilities. The Laboratory 
shares the collaboration's confidence in your abilities to provide the 
leadership so necessary to bring the DZero Project to completion next 
spring for the initiation of Run II.  We are all committed to having two 
complete, complementary collider detectors to explore the new mass 
region which will be opened with over 2 fb-1 of data.

	I wish you the best in this new appointment and commit to making 
every possible effort to work with you, Mike and the collaboration to 
bring success to DZero.

			Sincerely,




			K. C. Stanfield

Cc:	H. Montgomery
	J. Peoples
	M. Tuts
	M. Witherell
	J. Cooper
	R. Wunderlich,DOE-FERMI
	J.R. O'Fallon, DOE-SC
	M. Goldberg, NSF